Find every CalcBE.com tool grouped by category. Add calculators to your favourites so they surface on the home page.
New embed: Embed widget & share link builder produces prefilled share URLs, responsive iframe code, base64url cfg bundles, and auto-height snippets so you can embed CalcBE apps in LMS, blogs, or intranet portals.
Precision update: Significant Figures & Scientific Notation counts sig figs, normalizes scientific notation, and compares textbook versus final rounding rules with shareable How it’s calculated logs.
New optics: Lens & Mirror Equation walks through 1/f = 1/dₒ + 1/dᵢ with a live How it's calculated panel, ray diagram, CSV export, and shareable URLs for physics labs.
New electronics: RC / RL / RLC calculator tracks RC/RL time constants, divider gain, and series RLC resonance with full How it's calculated steps, CSV export, and shareable URLs.
New chemistry: Partial pressure & gas mixing documents Dalton's law, two-tank mixing, wet gas corrections, and van der Waals comparisons with CSV export and shareable URLs.
New chemistry: Buffer pH (Henderson–Hasselbalch) walks through mole conversions, r ratios, target pH design, strong acid/base additions, and buffer capacity β with shareable How it's calculated logs.
New worksheets: Worksheet & Quiz Auto-Generator outputs deterministic seeds, How it's calculated steps, CSV export, and print-ready PDFs for algebra classes.
Graph paper: Graph paper PDF generator builds millimeter-accurate Cartesian, polar, log-log, semilog, and isometric grids with How it’s generated steps, SVG/CSV export, and shareable URLs.
Number line: Number line & interval visualizer shades inequalities, interval unions, and intersections on an SVG number line, shows step-by-step reasoning, and offers SVG/PNG, CSV, and shareable URL exports.
Dimensional analysis: Dimensional analysis & unit consistency checker expands compound units, verifies equation consistency, and builds Buckingham Π groups with shareable How it’s calculated logs.
Latest physics: Simple Harmonic Motion (SHM) simulator unifies analytic, Euler-Cromer, and RK4 solutions with a How it's calculated log, shareable URLs, plots, and CSV exports for classroom use.
Latest addition: Error propagation (with steps) brings gradient×covariance, correlation matrices, templates, and seeded Monte Carlo validation together in one multilingual workspace.
New arrival: Sampling & Bootstrap — CLT Explorer brings seeded sampling, percentile/t/normal confidence intervals, CLT histograms, CSV export, and a full How it's calculated walkthrough to one shareable workspace.
Now available: Truth Table & Logic Evaluator builds paged truth tables, canonical DNF/CNF, and Karnaugh or Quine–McCluskey simplifications with shareable URLs, CSV export, and How it’s calculated logs.
Brand-new: Probability Simulator runs reproducible coin, weighted dice, and roulette experiments with theory vs empirical comparisons, Wilson 95% intervals, convergence charts, EV/house edge, CSV/LaTeX exports, and full How it's calculated steps.
Fresh release: CI & Hypothesis Test Wizard guides one- and two-sample mean or proportion analyses with Wilson/Newcombe intervals, live p-value shading, and shareable URLs.
New release: Riemann Sums Explorer plots left/right rectangles, trapezoids, and Simpson arcs, logs every step, compares an adaptive Simpson reference integral, and exports CSV, LaTeX, and shareable URLs.
Fresh drop: Distributions Pack Calculator brings binomial, Poisson, Student’s t, and chi-square together with PMF/PDF, CDF, quantiles, exact intervals, canvas visuals, CSV, LaTeX, and share links for class transparency.
New release: First-order ODEs (separable & linear) visualises the slope field, Simpson integrals, integrating factor, numeric inversion, RK4 error, CSV export, and shareable URLs in one workspace.
Check out the new Function Transformations Explorer to see how y = a·f(b(x−h)) + v shifts, scales, and reflects classic functions with step-by-step explanations.
New: Vector Calculator with step-by-step logs for dot/cross, projection, angle, areas, and the triple product, plus a 2D diagram.
Fresh release: Eigenvalues & Eigenvectors Explorer covering 2x2 and 3x3 matrices with rational-root checks, QR iteration, RREF eigenvectors, residuals, and a diagonalizability verdict.
We also launched the Limits Explorer to show numeric L'Hôpital iterations, one-sided sampling, and ready-to-share CSV logs.
Latest addition: Taylor & Maclaurin Series Explorer pairs symbolic derivatives with a least-squares fallback, plots f and P_n together, and exports error summaries, LaTeX, CSV, and shareable URLs.
New utilities: Random Number Generator, Text Case Converter, Image Resizer, Random Picker, Zenkaku / Hankaku Converter, and JSON Formatter & Validator all run entirely in the browser and are ready to embed.
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- Tools Directory (Browser-only) | CalcBE.com
Browse CalcBE.com tools that run entirely in your browser: PDF helpers, graph paper, worksheet generators, random pickers, and text/formatting utilities.
- Graph paper PDF generator | Cartesian, polar, log-log
Generate print-ready SVG graph paper in millimeters: Cartesian, polar, log-log, semilog, and isometric grids with How it's generated steps and CSV export.
- Acid–base pH calculator (strong & weak acids and bases)
Solve pH and pOH for strong and weak acids and bases and for strong acid–strong base mixtures, with clear steps and shareable URLs.
- Base Converter & Bitwise Toolkit (Bin/Oct/Dec/Hex) | CalcBE
Convert between binary, octal, decimal, and hexadecimal, and run AND/OR/XOR/NOT and bit shifts—then copy a shareable result link.
- Calorimetry calculator (specific heat, heat, final temperature)
Free calorimetry calculator to find heat, specific heat, temperature change, and final equilibrium temperature when mixing two substances.
- Conic sections calculator – standard form & focus | CalcBE
Classify a general quadratic, rotate to eliminate xy, complete the square to standard form, and visualize focus, directrix, and asymptotes. LaTeX/URL/CSV ready.
- Bingo card generator (printable) – 75/90 & custom | CalcBE
No install, free. Generate printable bingo cards in your browser (75/90 ball, range, or custom word bingo), shuffle a call list, then print or download.
- Password generator – strong secure random passwords | CalcBE
Generate strong random passwords in your browser with crypto.getRandomValues. Exclude ambiguous characters, meet rules, copy or download. Share settings only (no passwords in URLs).
Recently used
Every calculator you open is remembered locally so you can jump back in quickly.
Finance & money
Plan loans, project compound growth, convert currencies, and split bills.
- Loan calculator – monthly payment and interest | CalcBE
Enter loan amount, APR and term to calculate monthly payment and total interest. Free online loan calculator for mortgages, car loans and personal loans.
- Mortgage repayment planner – monthly payments, lump sums and refinance scenarios | CalcBE
Simulate mortgage repayments with equal payment or equal principal methods, include bonus payments, lump-sum prepayments, and compare refinance scenarios side by side.
- Compound Interest Calculator (Future Value & Effective Annual Rate) | CalcBE
Estimate future value and Effective Annual Rate from APR, compounding frequency, years, and optional monthly contributions. Copy a shareable result link.
- Discount calculator – stacked percentage, amount and coupon deals | CalcBE
Enter a list price and stack percentage cuts, fixed-amount deals and coupons to see final price and savings. Handy for checking sale deals.
- Retirement Savings Calculator (Contributions, Growth & Inflation) | CalcBE
Project your retirement nest egg by combining current savings, recurring monthly contributions, investment growth, and inflation assumptions.
- Fuel Economy, Gas Cost and Trip Cost Calculator | CalcBE
Estimate your real-world fuel economy, gas cost for a drive, and total trip cost including tolls and parking. Supports both metric and US units.
- Biweekly Loan Amortization Schedule (CSV Export)
Compute a biweekly amortization schedule (26 payments/year), include extra payments, and export the table to CSV.
- Break-even Point and Required Sales Calculator | CalcBE
Calculate the break-even point, required sales to reach a target profit, and profit at your planned sales volume. Simple break-even analysis for small businesses.
- Consumption Tax Calculator (10% / 8% with item breakdown) | CalcBE
Calculate Japanese consumption tax with standard 10%, reduced 8% or custom rates per item. Switch net↔gross prices, control rounding and share results.
- Credit Card Payoff & Debt Snowball Calculator | CalcBE
Estimate payoff time, total interest, and compare debt snowball vs. avalanche for multiple credit cards using your balances, APRs, minimum payments, and monthly budget.
- Deposit interest calculator: future value & EAR | CalcBE
Find future value, interest, and EAR from deposit amount, rate, years, and compounding choice. Instant browser results help you compare savings options.
- EMI Calculator (Loan EMI, Monthly Payment)
Calculate EMI (Equated Monthly Installment) from principal, annual interest rate, and term. See monthly payment, total paid and interest, with an easy shareable URL.
- Fixed Deposit (FD) Calculator
Compute maturity value, interest earned, and effective annual rate (EAR) from principal, annual rate, years, and compounding frequency. INR-friendly.
- GST Calculator (Add/Inclusive) | CalcBE
Enter amount and GST rate (5/12/18/28%) to compute base, GST amount, and total for both exclusive and inclusive cases. Shareable URL and copy results included.
- Income Tax Calculator India (FY example)
Estimate Indian income tax using example slabs for selected FYs (educational). Apply optional standard deduction, see taxable income, income tax, cess, and effective rate. Shareable URL included.
- Lira ↔ kurus converter – split Turkish currency into lira and kurus | CalcBE
Convert between Turkish lira and kurus with live calculations that respect 100 kurus = 1 lira. Enter either amount, see the breakdown instantly, and share your setup with a copyable URL.
- Loan Affordability (Max Principal by EMI Ratio)
Estimate maximum EMI and principal from monthly income, EMI ratio, annual rate, and term. Shareable URL. Educational only.
- Loan amortization calculator – schedule & CSV | CalcBE
Create a loan amortization schedule with principal, interest and balance per payment, test extra payments to see interest savings, and export table as CSV.
- Margin & markup calculator – profit margin, markup and selling price | CalcBE
Enter cost, price, margin %, or markup % and instantly solve the remaining fields. See margin on price and markup on cost with shareable results.
- Mortgage and Loan Repayment Burden Checker | CalcBE
Check your debt-to-income (DTI) ratio for a planned mortgage and other loans, and estimate how much you can safely borrow based on your income and target repayment burden.
- Net ↔ gross salary converter – illustrative tax and deduction breakdown | CalcBE
Quickly convert between gross and net salary using a simple example tax rate. Educational only—actual payroll rules vary.
- New NISA savings simulator – tax-free allowance vs taxable investments | CalcBE
Project your New NISA contributions versus a taxable account, track annual and lifetime allowance usage, and compare the after-tax difference with adjustable.
- PPF Calculator (Annual Contribution — Educational)
Estimate maturity, total invested, and gain from annual contribution, APR, and years with a simple annual-compounding model (educational). INR-friendly.
- Price, Cost, Margin and Markup Calculator | CalcBE
Quickly calculate profit margin, markup, selling price and cost per unit. Enter any combination of cost, price and target margin to see your profit and markup instantly.
- Recurring Deposit (RD) Calculator
Compute maturity amount, total invested, and estimated gain from monthly deposits, annual rate, and years. INR-friendly.
- Salary gross ↔ net educational estimator – taxes, deductions and take-home pay | CalcBE
Convert gross ↔ net salary using simple flat or example progressive rates. Educational estimator only, not a country-specific payroll calculator.
- Savings Goal & Monthly Contribution Calculator | CalcBE
Work out the monthly contribution to hit a savings goal, project how far your monthly deposits will grow, or estimate the time needed to reach your target with monthly compounding.
- Savings Goal Planner: Deposits, Time, Future Value | CalcBE
Work out the deposit needed to hit a savings target, the time required at a chosen deposit, or the future value of a plan using APR, EAR or continuous compounding. Educational only.
- Simple & Compound Interest, NPV & IRR Calculator | CalcBE
Compare simple and compound present/future values alongside cash-flow NPV and IRR. Model multiple discount-rate scenarios and share the results instantly.
- SIP Calculator (Investment)
Compute maturity amount, total invested, and estimated gain from monthly investment amount, expected annual return, and years. Shareable URL included.
- Split Bill Calculator (tax, weights, rounding, QR) | CalcBE
Split a bill with inclusive or exclusive tax, custom weights, representative adjustments, and share the result via URL or QR code.
- Tip & split calculator – restaurant tip, bill sharing and per-person amount | CalcBE
Enter the bill total and tip percentage to instantly see the tip amount, new total, and per-person share when splitting the bill.
- VAT / Sales Tax calculator – exclusive ↔ inclusive amounts with custom rates | CalcBE
Convert between net and gross amounts for VAT or sales tax. Enter a price, tax rate and direction to see tax, net and total at once, with flexible rounding rules.
- VAT net ↔ gross quick converter – add VAT to net or strip tax from totals | CalcBE
Quickly convert between VAT-exclusive (net) and VAT-inclusive (gross) prices at standard rates. Enter either net or gross and see all three: net, VAT, and gross.
Unit converters
Convert everyday units quickly for study, travel, and DIY projects.
- Universal Unit Converter for Length, Area, Volume & More | CalcBE
Convert length, area, volume, mass, speed and temperature units instantly. Pick a category, enter a value and read the full conversion table, then copy results or share a URL.
- Temperature Converter (Celsius, Fahrenheit, Kelvin) | CalcBE
Convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) with precise formulas, keyboard input, and a shareable result link.
- Length Converter (m, km, cm, mm, inch, foot, yard, mile) | CalcBE
Convert lengths across metric and imperial units at once with SI‑based factors, keyboard input, and a shareable result link.
- Currency converter – manual rates, base currency and quick totals | CalcBE
Convert currencies with manual rates or a base‑currency cross. Enter a direct quote or two‑step rate, swap currencies, and copy a shareable result.
- Live FX currency converter – ECB reference rates and open API | CalcBE
Convert currencies with live FX rates from ECB or Open ER API, view recent history, and share results. Offline cache and favorites supported.
- Data Size, Transfer Speed & Time Calculator | CalcBE
Calculate transfer time, required speed, or transferable data size. Clear bits vs bytes and SI vs IEC units, plus an optional efficiency factor.
Date & time
Track schedules, deadlines, and logs with dedicated date-time tools.
- Date Difference Calculator (days, business days, Y/M/D) | CalcBE
Compute days between dates, count business days and working hours, and see a year‑month‑day breakdown. Optionally include the start date.
- Business Days & Countdown Calculator | Skip Weekends | CalcBE
Count calendar or business days between two dates, exclude custom weekend patterns and holiday lists, and jump forward or backward by N business days.
- Time zone converter – instant world clock with multiple cities and offsets | CalcBE
Enter a date and time to convert between time zones, with automatic daylight‑saving shifts, presets for major cities, and a shareable result link.
- Time duration adder & subtractor (HH:MM/HH:MM:SS) | CalcBE
Add or subtract HH:MM or HH:MM:SS durations line by line and get the total time. Perfect for work logs, timesheets and media editing in your browser.
- Age Calculator (Current Age, Y-M-D, Next Birthday) | CalcBE
This free age calculator converts your date of birth and an optional reference date into your exact age in years, months and days, plus how many days remain until your next birthday. Use it for online forms, insurance…
- Running Pace, Time and Distance Calculator | CalcBE
Solve running pace, time, or distance from the other two. Race presets (5K, 10K, half, marathon) with min/km or min/mile plus km/h speeds and lap splits.
- Speed–Distance–Time Calculator with Pace & ETA | CalcBE
Calculate speed, distance, or time from the other two. Includes unit conversions, pace output for running, and optional ETA from a start time.
- Recurring counter: counts in range, next date, Nth | CalcBE
Count how many times a recurring event happens in a date range. Also find the Nth occurrence date or the next occurrence after a reference date.
- Week number, quarter and fiscal year calculator | CalcBE
Get ISO week number, calendar/fiscal quarter, and fiscal year for any date. Customize week rules and fiscal year start month.
Math & statistics
Solve common classroom and analytics problems without spreadsheets.
- 2D graphing calculator – plot and intersect functions | CalcBE
Plot up to three functions, find intercepts, intersections and extrema numerically, and explore the graph with zoom, pan, shareable URLs and clear step-by-step logs.
- Quadratic & polynomial equation solver – worked steps and graph insights | CalcBE
Solve quadratic and low-degree polynomial equations with exact and decimal roots, discriminant classification, factorization, completing the square and a graph, all with worked steps.
- Quadratic equation solver – roots, discriminant and vertex form | CalcBE
Solve ax² + bx + c = 0 and see real or complex roots, the discriminant, vertex form and a quick graph. Automatically switches to the linear case when a = 0.
- Fraction Simplifier & Mixed Number Converter (Steps & Visuals) | CalcBE
Reduce any fraction, convert between improper and mixed numbers, and review Euclidean GCD steps with pie and number line visuals for lessons.
- Percentage Calculator (X% of Y, increase/decrease) | CalcBE
Work out X% of Y, what percent one number is of another, and the new value after a percent increase or decrease. You can also copy a link to the result.
- Prime Factorization Calculator | Miller–Rabin & Pollard Rho | CalcBE
Factor integers fast with Miller–Rabin and Pollard Rho. See canonical form, steps, and arithmetic functions like τ(n), σ(n), φ(n), μ(n), rad(n).
- Probability Simulator — coin, dice, roulette (theory vs empirical, with steps) | CalcBE
Simulate coin tosses, dice rolls and roulette spins with a fixed seed to compare theoretical and empirical probabilities. Inspect confidence intervals, convergence charts and shareable runs.
- 2D geometry calculator – area & perimeter of shapes | CalcBE
Compute area and perimeter for rectangles, circles, triangles, trapezoids and regular polygons from side lengths, radii or heights, with formulas shown for homework and quick design checks.
- 3D Geometry Calculator (Sphere, Cylinder, Cone, Prism) | CalcBE
Compute volume and surface area for spheres, cylinders, cones, rectangular and regular prisms—with example inputs, step-by-step formulas, and a shareable result link.
- Acid-base titration curve and pH calculator
Free acid-base titration calculator for strong and weak acids and bases. Compute pH at any point and generate titration curves with step-by-step explanations.
- Acid–base pH calculator (strong & weak acids and bases)
Solve pH and pOH for strong and weak acids and bases and for strong acid–strong base mixtures, with clear steps and shareable URLs.
- Acid–base titration curve calculator – pH vs volume with worked steps | CalcBE
Plot strong and weak acid–base titration curves, highlight buffer regions and equivalence points, and review the Henderson–Hasselbalch or hydrolysis steps behind each segment.
- Algebra simplifier with colors for like terms | CalcBE
Expand with distribution, color-match like terms, and simplify step by step. See sign flips, teacher mode, shareable URL, LaTeX copy, and SVG export all in your browser.
- APR↔EAR rate converter (monthly, daily & effective annual) | CalcBE
Convert nominal APR into equivalent monthly, daily and effective annual rate (EAR), or reverse from periodic rates back to APR so you can compare loans, credit cards and savings offers. Free, browser-based interest ra…
- Arithmetic & Geometric Sequence Calculator | CalcBE
Compute the nth term, partial sum, common difference or ratio, and number of terms for arithmetic and geometric sequences. Shows formulas, steps, term previews, and infinite geometric series when |r| < 1.
- Base Converter & Bitwise Toolkit (Bin/Oct/Dec/Hex) | CalcBE
Convert between binary, octal, decimal, and hexadecimal, and run AND/OR/XOR/NOT and bit shifts—then copy a shareable result link.
- Beer-Lambert law calculator and calibration curve (A = εlc)
Free online Beer-Lambert law calculator for absorbance, concentration, molar absorptivity, path length, and calibration curves. Great for general chemistry and lab reports.
- Bingo card generator (printable) – 75/90 & custom | CalcBE
No install, free. Generate printable bingo cards in your browser (75/90 ball, range, or custom word bingo), shuffle a call list, then print or download.
- Birthday paradox (collision probability) calculator | CalcBE
Calculate the birthday paradox collision probability with exact math + a Monte Carlo simulator. Get P(collision), P(no collision), a Poisson approximation with error, and the required sample size n for a target probab…
- BMR & TDEE calculator – daily calorie needs and energy use | CalcBE
Estimate your basal metabolic rate and total daily energy expenditure with the Mifflin-St Jeor equation. Enter your age, sex, height, weight and activity level to see maintenance calories.
- Buffer pH (Henderson–Hasselbalch) with steps — design, additions, capacity | CalcBE
Compute buffer pH with the Henderson–Hasselbalch equation, design mixtures for a target pH, and model strong acid/base additions with buffer capacity and step-by-step logs.
- Calorimetry calculator (specific heat, heat, final temperature)
Free calorimetry calculator to find heat, specific heat, temperature change, and final equilibrium temperature when mixing two substances.
- Card deck shuffler – shuffle & draw cards | CalcBE
Shuffle a deck of playing cards and draw or deal cards in your browser. Choose decks and jokers, then copy or download results. Share settings only (no history in URLs by default).
- Chemical Equation Balancer + Stoichiometry (with steps) | CalcBE
Balance chemical equations with nullspace Gauss-Jordan steps, compute limiting reagent, theoretical and percent yield, and combine redox half-reactions with shareable outputs.
- Chemical equilibrium ICE table calculator (Kc, Kp)
Calculate equilibrium concentrations and a full ICE table from Kc or Kp and initial conditions for a single chemical reaction. Useful for general chemistry and lab reports.
- CI & Hypothesis Test Wizard (Means & Proportions) | CalcBE
Build confidence intervals and hypothesis tests for means and proportions. Supports Welch, paired, Wilson, Newcombe, and visualises p-values.
- Circular & necklace permutation calculator | CalcBE
Compute circular permutations (rotation counted as the same) and necklace/bracelet permutations (rotation + reflection counted as the same) from n. Shows exact values, digit count, formula, short steps, and a shareabl…
- Circular motion & centripetal force calculator
Free circular motion calculator for centripetal acceleration, centripetal force, angular speed, period, frequency, and ideal banked-curve angle.
- Colligative properties calculator – ΔTb, ΔTf and osmotic pressure | CalcBE
Compute boiling-point elevation, freezing-point depression and osmotic pressure from solute and solvent data, or estimate molar mass from colligative measurements.
- Compare PDFs by text – browser-only diff tool for document revisions | CalcBE
Upload two PDFs, extract their text locally, and highlight differences by line or paragraph. No uploads—diff stays in your browser.
- Complex Number Calculator — a+bi ↔ polar with steps | CalcBE
Convert between a+bi and r∠θ, perform complex addition, subtraction, multiplication, division, powers, and list n-th roots with a live Argand plot and step-by-step breakdown.
- Concentration & pH calculator – step-by-step chemistry working | CalcBE
Calculate molarity, mass percent, M1V1 dilution, mixing, w/w→M, and strong or weak acid-base pH with 25 °C assumptions and a detailed step-by-step breakdown.
- Concrete, Gravel & Mulch Calculator | Material Estimates | CalcBE
Estimate concrete volume and bag counts, gravel coverage and tons, and mulch bags with US or metric inputs plus a waste allowance. Results are informational only.
- Conic sections calculator – standard form & focus | CalcBE
Classify a general quadratic, rotate to eliminate xy, complete the square to standard form, and visualize focus, directrix, and asymptotes. LaTeX/URL/CSV ready.
- Coordinate geometry calculator – distance & lines | CalcBE
Compute distance, midpoint, slope, line equations, circles, and intersections with full working shown beside the results and a live coordinate plane diagram.
- Credit Card Minimum Payment Simulator
Estimate months to payoff and total interest by entering balance, APR, and your card’s minimum payment policy (rate and/or fixed amount). Shareable URL included.
- Crop & resize PDF pages – adjust size, margins and orientation in your browser | CalcBE
Crop and resize PDF pages in your browser. Draw a crop area, pick a target size (A4, Letter, or custom), add margins, and export—no uploads.
- Debt-to-Income (DTI) Calculator
Enter monthly income and monthly debt payments to compute your DTI percentage and a quick category label. Shareable URL and copy results included.
- Deck & Terrace Paint Area Calculator | Gallons & Liters | CalcBE
Estimate deck and terrace paintable area plus primer/topcoat gallons or liters from one rectangle, multiple zones, or a known area. Switch ft/m, include gaps and edges, add railing, set coats, waste, and coverage over…
- Descriptive Statistics + Box Plot & Histogram (with steps) | CalcBE
Paste a dataset or upload CSV/TSV to review descriptive statistics, histogram, box plot, outlier counts, trimmed mean, CSV export, LaTeX summary, and documented steps.
- Dice Roller for d4-d100 rolls with PNG sharing | CalcBE
Roll d4-d100 with quick buttons or notation like 2d6+3, see totals and breakdowns, keep history, and share text or PNG cards directly from your browser.
- Dice stats – success odds & distribution calculator | CalcBE
Compute success probabilities, exact or simulated distributions, mean/SD, and top modes for NdS +/- K dice notation. Auto switches Exact/Sim, shows histograms, and shares as text, PNG, or URL entirely in the browser.
- Dice tools | Roller, TRPG checks, dice stats | CalcBE
Browser-only dice tools: a dice roller, TRPG dice checks, and Dice stats for success odds and distributions.
- Differentiation Calculator (steps, tangents, numeric) | CalcBE
Compute symbolic and numeric derivatives for single-variable, parametric, implicit, and partial derivatives. See Richardson extrapolation steps and tangent lines instantly for teaching and study.
- Dimensional analysis & unit consistency checker (with steps) | CalcBE
Parse compound units, verify equation consistency, and generate Buckingham Π groups with step-by-step logs, CSV export, and shareable URLs.
- Distance modulus & stellar magnitude calculator
Compute distance, apparent magnitude, or absolute magnitude from the distance modulus m - M = 5 log10(d/10 pc), and see how brightness scales with distance using a simple 1/r^2 graph.
- Distribution calculator – binomial, Poisson & t | CalcBE
Compute PMF/PDF, CDF, quantiles, and exact confidence intervals for binomial, Poisson, Student's t, and chi-square distributions with step-by-step explanations, graphs, CSV, LaTeX, and shareable URLs.
- Distribution sampler – random samples & histograms (normal, Poisson) | CalcBE
Generate random samples from common distributions (normal, log-normal, gamma, poisson, and more). Visualize histograms, check summary stats, and download CSV/JSON — runs locally in your browser.
- Earthquake magnitude & energy comparison calculator
Compare two earthquake magnitudes and compute the energy ratio using E2/E1 = 10^{1.5(M2 - M1)}, with intuitive explanations and a log-scale bar view.
- Eigenvalues & Eigenvectors (2x2, 3x3) — with steps | CalcBE
Compute eigenvalues, eigenvectors, residuals, and multiplicities for 2x2 and 3x3 matrices with analytic, rational-root, and QR iteration explanations.
- Electrochemical cell & Nernst equation calculator | CalcBE
Compute standard cell potentials E°, standard ΔG°, equilibrium constants K, Nernst equation E under non-standard conditions, and concentration cell voltages with clear steps and shareable URLs.
- Empirical & molecular formula calculator online | CalcBE
Find empirical and molecular formulas from percent composition, combustion data or hydrates with clear, step-by-step working for lab and homework.
- Epoxy mix ratio calculator (weight & volume) | CalcBE
Split two-component epoxy or paint kits by weight or volume, convert weight ratios with densities, and see Part A/B amounts instantly with a shareable URL.
- Epoxy resin quantity & weight calculator for projects | CalcBE
Estimate epoxy resin volume and weight from area × thickness or box/cylinder molds, apply waste allowance and density, split into safe batches, and share your setup.
- Error propagation calculator – sums, products & powers | CalcBE
Propagate uncertainty for sums, products, powers and general functions using gradient×covariance steps, correlation options and Monte Carlo checks, with templates for common lab calculations.
- Exterior Paint Area & Quantity Calculator | CalcBE
Estimate exterior wall area and paint gallons or liters from building dimensions, wall segments, or a known area. Adjust doors, windows, coats, waste, primer, and coverage presets.
- Fence Paint Area & Quantity Calculator | Gallons & Liters | CalcBE
Estimate fence paintable area and paint volume from run and height, panel mix, or a known area. Choose one-side/both-side, account for gates, coats, waste, primer, coverage overrides, and share the URL.
- First-order ODEs (Separable & Linear) + Direction Field — with steps | CalcBE
Visualise separable and linear first-order ODEs with slope fields, Simpson integrals, integrating factors, numeric inversion, RK4 checks, CSV export, and shareable URLs.
- Fraction Calculator (Reduce, Mixed Numbers, Common Denominators) | CalcBE
Enter mixed or improper fractions as-is, perform addition, subtraction, multiplication, or division, and instantly view reduced results, mixed-number forms.
- Free QR code generator & scanner – create, verify, download | CalcBE
Generate QR codes for URLs, text, Wi-Fi, contacts, phone, email, and SMS. Preview and validate instantly, then download PNG/SVG/PDF or share a settings link — all in your browser.
- Function Transformations Explorer (Translate, Scale, Reflect) | CalcBE
Adjust a, b, h and v in y = a·f(b(x−h)) + v to see how shifts, stretches and reflections change graphs, then compare the original and transformed curves side by side.
- GCD & LCM calculator – greatest common divisor tool | CalcBE
Compute the GCD and LCM for up to 32 integers using Euclid’s algorithm and successive reduction. Paste values and copy a shareable result link.
- GCD & LCM Calculator (with Steps) — Extended Euclid & Ladder Method | CalcBE
Follow gcd and lcm with ladder (division) steps and Euclidean a = q·b + r logs, plus extended Euclid back substitution and teacher notes.
- Graph paper PDF generator | Cartesian, polar, log-log
Generate print-ready SVG graph paper in millimeters: Cartesian, polar, log-log, semilog, and isometric grids with How it's generated steps and CSV export.
- Hardy–Weinberg equilibrium and chi-square calculator
Check Hardy–Weinberg equilibrium from genotype counts or allele frequencies, and compute the chi-square statistic and expected genotype frequencies.
- Histogram & cumulative frequency from grouped data | CalcBE
Enter grouped or raw data to build a derived frequency table, histogram (frequency or frequency density), and cumulative frequency ogive. Detect unequal widths, highlight modal/median classes, copy a shareable URL, an…
- House Paint Cost Estimator (Exterior & Roof) | CalcBE
Estimate exterior, roof, trim, fence, and deck paint costs from area or house size using preset or custom unit rates. Add overhead, tax, and share a quick quote.
- Hypergeometric calculator (without replacement) | CalcBE
Compute hypergeometric probabilities (without replacement): P(X=k), tails, and ranges. PMF chart/table, seeded simulation, share URL, and CSV.
- Ideal gas law calculator (PV = nRT & gas laws)
Free ideal gas law calculator to solve PV = nRT, combined gas law problems, and gas density and molar mass with automatic unit conversions.
- Image Resizer & Format Converter | PNG, JPEG, WEBP
Resize and convert images entirely in your browser. Change width, height, format, and quality, then download the result without uploading files to a server.
- Images to PDF – combine photos in browser | CalcBE
Convert multiple images to a single PDF with page size, orientation, margins, and fit options. Runs fully in your browser with no uploads.
- Inclusion–Exclusion — at least one & none | CalcBE
Compute |A∪B∪…| (“at least one”) for 2–4 sets. For 2–3 sets you can input Venn regions (easy) or intersection sizes. Optionally add N to get “none”, probabilities, exactly 1/2/… counts, and a shareable URL.
- Industrial DFT/WFT & paint consumption calculator | CalcBE
Convert dry/wet film thickness from volume solids, see theoretical coverage and paint use, or reverse-calc DFT from actual consumption with density and a shareable URL.
- Inequality Solver (1 & 2 Variable) — Steps & Graphs | CalcBE
Solve linear, compound, absolute value, quadratic, and rational inequalities with shareable steps, plus half-plane and system visuals that shade the feasible region.
- Integration calculator – numeric approximations and step-by-step explanations | CalcBE
Compute definite integrals with trapezoid, Simpson, adaptive and Gaussian methods while logging nodes, weights and error estimates. Includes basic antiderivatives and applied examples.
- Interior paint calculator (simple) | CalcBE
Estimate wall and ceiling paint area, litres/gallons, extra allowance, and cans from room size or a known area. Metric/US units, 1–4 coats, shareable URL.
- Inverse proportion y=k/x explorer | signs & k | CalcBE
Explore the inverse proportion y=k/x with xy=k held constant. Sync equation, table, and graph, highlight quadrants by sign, show asymptotes, tracer, table consistency checks, shareable URL, SVG/CSV exports, and teache…
- Invoice net ↔ gross calculator – add or remove VAT on totals | CalcBE
Convert net ↔ gross invoice amounts with a VAT rate. Choose whether the entered amount is net or VAT-inclusive, pick the rate and rounding, and share results with a URL or CSV.
- IPv4 subnet & CIDR calculator – network address, host range and usable IPs | CalcBE
Convert any IPv4 address and prefix length into its network address, broadcast address, usable host range, and total capacity.
- JSON Formatter & Validator | Pretty-print and check errors
Pretty-print, minify, and validate JSON in your browser. Highlight errors and copy formatted results without sending data to a server.
- Kepler's third law & orbital period calculator
Compute orbital periods and semi-major axes from Kepler's third law, compare with Solar System planets on a log–log a–T diagram, and see a top-down orbit scale view.
- Kinematics: SUVAT / Projectile / Free Fall (steps) | CalcBE
Solve SUVAT unknowns, 2D projectile motion and free-fall on one page. Get step-by-step logs, quadratic root reasoning, shareable URLs, plots, and teacher notes.
- LaTeX Equation Editor — Live MathJax, palette, templates, history | CalcBE
A premium LaTeX equation editor with live MathJax preview, caret-aware palette, templates, history, and one-tap copy/share. Tailored for math, physics, and engineering workflows.
- Lens & Mirror Equation — with steps and ray diagram | CalcBE
Compute image distance, magnification, and principal rays for thin lenses or mirrors with a live How it's calculated log, CSV export, and shareable links.
- Lens and mirror equation & magnification calculator
Free lens and mirror equation calculator for thin lenses and spherical mirrors. Compute image distance, magnification, and classify images as real or virtual, upright or inverted.
- Limiting reagent, theoretical yield, percent yield & purity — with steps
Step-by-step chemistry calculator auto-balances reactions, converts g/mol/M×L with purity adjustments, and reveals limiting reagents, theoretical yield, percent yield, and reactant purity.
- Limits Explorer — One-sided limits & numeric L'Hôpital | CalcBE
Diagnose indeterminate forms, apply numeric L'Hôpital, sample one-sided limits, and visualise the graph near the approach point. Shareable URL, LaTeX copy, and CSV export included.
- Linear equation solver with both-side steps | CalcBE
Linear equation solver that logs each same-operation step. Clear denominators, handle fractions and parentheses, verify the answer, and share URLs or LaTeX/SVG from the browser.
- Linear function y=ax+b explorer | formula & graph | CalcBE
Explore y=ax+b by syncing formula, table, and graph. See slope triangles and difference tables, infer a and b from two points or a data table, drag anchors, share URLs, and export SVG/CSV with a teacher mode.
- Linear Regression & Correlation — Scatter, OLS/WLS, R² (with steps) | CalcBE
Paste x,y[,w] data or upload a CSV to fit OLS, WLS or Theil–Sen regression. See the fitted line, 95% bands, residual plots and key tests on one interactive chart.
- Linear systems solver – 2×2 and 3×3 equation systems with step-by-step working | CalcBE
Solve 2×2 and 3×3 systems of linear equations with Gaussian elimination (RREF), classify solutions, show parametric forms, residuals, elimination steps, and optional 2×2 Cramer's rule.
- Linear Systems Solver with RREF Steps (2×2 & 3×3) | CalcBE
Reduce 2×2 and 3×3 linear systems with Gaussian or Gauss-Jordan elimination, log every row operation, keep exact fractional answers, and share matrices in one click.
- List Shuffler (Random Order Generator) – fair shuffle | CalcBE
Shuffle a list fairly with Fisher–Yates. Copy results, share a URL, and optionally reproduce the same order with a seed—runs locally in your browser.
- Log Laws Transformer (with steps) — expand, condense, change of base | CalcBE
Expand, condense, and evaluate logarithms with shareable steps. Convert between bases (log10 and ln), copy LaTeX, and guide lessons with teacher mode.
- Long addition & subtraction (decimal carry/borrow) | CalcBE
See column addition or subtraction with decimals, carry, and borrow explained per digit. Copy a shareable URL or LaTeX, switch to teacher mode, and keep trailing zeros if you need them.
- Long division calculator – step-by-step quotient and remainder working | CalcBE
Enter a dividend and divisor to see the quotient, remainder, and a school-style long division layout with step-by-step explanations. Works with decimals and repeating decimals.
- Lottery odds calculator – tiers & expected value | CalcBE
Compute lottery odds for lotto-style games (main + bonus) and 2-pool games. Instantly see tier-by-tier probabilities, total win odds, odds inverse (1 in X), multi-ticket “at least one win”, target-ticket counts (50/90…
- Matrix Calculator — RREF / Solve Ax=b / Inverse / Determinant (with steps) | CalcBE
Compute RREF, solve Ax=b, find the inverse, determinant, rank, null space, row and column spaces with detailed elimination logs. Supports exact fractions, decimals, shareable URLs, and LaTeX export.
- Mean and Standard Deviation Calculator (Population vs Sample) | CalcBE
Paste or type your dataset to compute count, mean, variance, and standard deviation (population N and sample N‑1), then copy a shareable result link.
- Merge PDFs – reorder and combine multiple files locally in your browser | CalcBE
Merge multiple PDFs in your browser. Reorder files, choose page ranges if needed, and download instantly with no uploads.
- Modular arithmetic calculator – GCD, inverse & CRT | CalcBE
Compute extended GCD, modular inverses, fast power, CRT and linear congruences with BigInt precision. Review every iteration in a How it's calculated table, export CSV and share setups by URL.
- Momentum & 1D collision calculator
Free physics calculator for 1D collisions using conservation of momentum and coefficient of restitution. Compute final velocities and energy loss with step-by-step explanations.
- Multiset permutation & anagram count calculator | CalcBE
Count distinct permutations of strings with repeated characters using multinomial coefficients. Shows BigInt exact results, digit count, scientific notation, steps, random examples (small n), and shareable URLs.
- Normal Distribution Calculator — PDF/CDF/Quantile & Z-Score | CalcBE
Enter a mean and standard deviation to compute normal PDF, CDF, tail probabilities, quantiles and z-scores, with a shaded curve and step-by-step explanations ideal for teaching.
- Ohm's law and simple DC circuit calculator
Free calculator for Ohm's law and simple DC circuits. Solve voltage, current, resistance, power, and equivalent resistance in series or parallel.
- Page numbers & watermarks – stamp PDFs in browser | CalcBE
Add page numbers or text watermarks to a PDF entirely in your browser. Choose positions, formats, ranges, and opacity—no uploads.
- Paint Coverage Calculator | Liters & Gallons Estimate | CalcBE
Estimate paint from room dimensions or custom surfaces. Adjust coats, waste, substrate absorption, and primer to see liters, gallons, and suggested can counts.
- Partial fractions calculator – decomposing rational expressions with steps | CalcBE
Decompose rational functions into partial fractions with polynomial long division, Durand-Kerner factorisation, Gaussian elimination, LaTeX, CSV, and shareable URLs.
- Partial pressure & gas mixing calculator – Dalton's law | CalcBE
Apply Dalton's law for gas mixtures, run two-tank isothermal mixing and wet-gas corrections, and compare ideal vs van der Waals pressure with clear logs, CSV export and shareable URLs.
- Pascal's Triangle & Binomial Expansion (with steps) | CalcBE
Generate Pascal rows, combinations, and binomial expansions with BigInt accuracy. Watch How it's calculated, export CSV logs, inspect row identities, and share lesson-ready URLs.
- Passphrase generator (Diceware-style) – random words | CalcBE
Generate a strong passphrase from random words (Diceware-style) locally in your browser. Choose word count, separators, and case, then copy or download. Share settings-only URLs (no passphrases).
- Password generator – strong secure random passwords | CalcBE
Generate strong random passwords in your browser with crypto.getRandomValues. Exclude ambiguous characters, meet rules, copy or download. Share settings only (no passwords in URLs).
- PDF compressor – shrink large PDF files in your browser without uploads | CalcBE
Reduce PDF size entirely in your browser. Choose quality presets or custom DPI/quality, convert to grayscale, and download instantly without uploading files.
- PDF form filler & flattener – complete forms and lock in answers in your browser | CalcBE
Fill PDF form fields, preview highlights, keep fields editable or flatten them, and download instantly. All changes stay in your browser.
- PDF highlighter & annotator – markup in browser | CalcBE
Highlight, draw, and place text notes on PDFs in your browser. Navigate pages, undo steps, and export a flattened annotated PDF—no uploads.
- PDF metadata editor – edit title, author & keywords | CalcBE
Read and update PDF metadata such as title, author, subject, keywords, and dates entirely in your browser. No uploads required.
- PDF page organizer – reorder, rotate & delete pages | CalcBE
Reorder, rotate, duplicate, or delete PDF pages in your browser. Drag thumbnails, then export a new PDF without uploading files.
- PDF sign & stamp tool – add signatures and approval stamps in your browser | CalcBE
Create a signature, place it on pages, add dates or approval stamps, and export a signed PDF. All processing stays in your browser.
- PDF to images converter – export PDF pages as PNG or JPEG files in your browser | CalcBE
Convert PDF pages to PNG or JPEG entirely in your browser. Choose resolution, format, and page ranges, then download each page or a ZIP—no uploads required.
- PDF to text converter – extract text in browser | CalcBE
Extract text from PDFs entirely in your browser. Combine pages or keep per-page output, choose layout or paragraph mode, and download as TXT with no uploads.
- PDF Tools (browser-only) | Compress, merge, convert, annotate | CalcBE
A fast, private PDF toolkit that runs entirely in your browser: compress, merge, split, convert images, extract text, add watermarks, and more without uploading files.
- Permutation & Combination Calculator (nPr, nCr) — with Steps | CalcBE
Compute permutations nPr, combinations nCr, and factorial n! with exact BigInt results, scientific-notation approximations, step logs, teacher notes, and shareable URLs.
- Permutation test – exact p-value for A/B and paired | CalcBE
Run a permutation (randomization) test for two independent groups or paired samples. Visualize the null distribution and download a JSON/CSV report — all in your browser.
- Prime factorization calculator – primes, divisors | CalcBE
Factor any positive integer into primes and see exponents, divisor counts and primality. Copy a shareable result link for homework or quick checks.
- Prime Factorization with Steps & Factor Tree | τ(n), σ(n), φ(n) | CalcBE
Factor any integer into primes, see every trial division step, compute τ(n), σ(n), φ(n), and draw the factor tree. Optional second integer shows gcd/lcm via exponents.
- Probability tree & 2×2 table — AND/OR & complement | CalcBE
Probability tree & 2×2 table tool for AND/OR/NOT and complements. Highlights matching paths/cells and explains products, sums, and 1−P with steps. Copy a shareable URL, SVG, or LaTeX.
- Projectile motion calculator (time of flight, range, height)
Free projectile motion calculator to find time of flight, horizontal range, maximum height, and required launch speed for a given target.
- Pythagorean theorem calculator | Diagram & area model | CalcBE
Solve and visualize a²+b²=c² with a right-triangle diagram and area model. Find any side, check a triangle, or measure distance with exact radicals, steps, shareable URL, LaTeX, and SVG.
- Random CSV generator – test data & schema JSON | CalcBE
Generate random CSV test data in your browser. Define columns, preview rows, then download CSV and schema JSON — no uploads and share settings-only URLs.
- Random Date & Time Generator – random datetime/timestamp | CalcBE
Generate random dates, times, and datetimes in your browser. Choose a range, weekdays, exclusions, time windows, and steps. Copy/download results and share settings-only URLs.
- Random Number Generator | Integers, decimals, seeds
Generate random integers or decimals in your browser with optional seeds, unique values, and copyable results. Everything runs locally without sending data to the server.
- Random Picker | Draw winners without repeats
Pick one or more random items from a list in your browser. Great for lotteries, giveaways, and classroom activities. Everything runs locally without sending data to the server.
- Randomness beacon verifier – paste a beacon to verify draws | CalcBE
Paste a public beacon value to verify a deterministic draw or shuffle. Create a commit hash, reproduce results, and download JSON/CSV/PNG — runs locally.
- Randomness tests – chi-square, runs, ACF, JB | CalcBE
Run chi-square, runs, autocorrelation, and Jarque–Bera on bit or number sequences. Visualize results and download a report—runs locally in your browser.
- Ratio, Proportion & Percentage Solver (Step-by-Step) | CalcBE
Simplify ratios, solve proportions, split totals, compare percentages and convert map scales with transparent step-by-step working, teacher mode, shareable links, and LaTeX output.
- RC / RL / RLC Calculator — time constant, cutoff, resonance & phase (with steps) | CalcBE
Analyse RC, RL, and RLC networks with step-by-step formulas. Compute time constants, divider gain, resonance, and equivalent series or parallel values with shareable results.
- Reaction kinetics calculator – rate laws, half-life and concentration vs time | CalcBE
Online reaction kinetics calculator for 0th, 1st and 2nd order reactions. Compute half-lives and rate constants, fit data and analyse Arrhenius plots.
- Repetition calculator – n^r & nHr (multichoose) with steps | CalcBE
Calculate permutations with repetition (n^r) and combinations with repetition (nHr = C(n+r-1,r)) with Exact BigInt results or fast scientific-notation approximations. Includes step logs, teacher mode, and shareable URLs.
- Resistor Color Code Calculator (4-Band, 5-Band, 6-Band) | CalcBE
Decode 4‑band, 5‑band, and 6‑band resistor colour codes. See nominal value, tolerance, and temperature coefficient, then copy a shareable result link.
- Riemann Sums Calculator | Left/Right/Trapezoid/Simpson | CalcBE
Visualise left/right, midpoint, trapezoid and Simpson sums for f(x), compare with an adaptive Simpson reference, and export CSV or share a link.
- Roof Paint Area & Quantity Calculator | CalcBE
Estimate roof paintable area and paint gallons or liters from building size, roof slope, or a known area. Adjust overhangs, skylights, coats, waste, primer, and coverage presets.
- Rounding & error bands | Intermediate vs final | CalcBE
Round any number, highlight the digit you inspect, and see the error band on a number line. Compare intermediate vs final rounding with the same settings, copy a shareable URL or LaTeX, and save the SVG for class use.
- Sampling & Bootstrap — CLT Explorer (with steps) | CalcBE
Simulate samples from common distributions, bootstrap means or proportions, and see CLT histograms with step-by-step explanations for classroom demos.
- Scientific calculator – trig, logs, powers and degree / radian angle modes | CalcBE
Run trig, logs, exponents, and factorials with Deg/Rad modes, keyboard input, memory, and a shareable URL that preserves your expression and settings.
- Seating Chart Generator (Random) — Classroom & Tables | CalcBE
Generate a random seating chart for classrooms or tables. Add optional constraints like fixed seats and avoid-adjacency pairs, then print or download as CSV/JSON/HTML.
- Secret Santa generator (exclusions) – draw names fairly | CalcBE
Generate Secret Santa assignments in your browser. Add exclusions (NG pairs) and groups, then reveal recipients one by one to reduce accidental leaks. Copy, download, and share settings-only URLs.
- Sector arc length, area & angle calculator | CalcBE
Solve a sector’s arc length l, area A, central angle θ, or radius r with units and a live diagram. See the θ/360 ratio, validation against 2πr and πr², example chips, teacher mode, shareable URL, LaTeX copy, and SVG e…
- Sequences & Series (Arithmetic / Geometric) — terms & sums with steps | CalcBE
Compute arithmetic and geometric sequences with step-by-step logs: nth terms, partial sums, solving for n or k, two-point inference, and table generation with shareable outputs.
- Shuffle bias comparison – naive vs Fisher–Yates | CalcBE
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- Signed number line calculator & sign rules | CalcBE
Add, subtract, multiply, and divide signed numbers with a number-line animation for plus/minus moves. See the sign table for × and ÷, play the steps, copy LaTeX or the result, download the SVG line, and share a URL wi…
- Significant Figures & Scientific Notation with Steps | CalcBE
Count significant figures, normalize numbers to scientific notation, and apply half-up, half-even or away-from-zero rounding for + − × ÷ with side-by-side textbook and final rounding.
- Similarity ratio calculator – side, area, volume | CalcBE
Enter a similarity ratio (small:large) to see side/perimeter, area (square), and volume (cube) ratios with scale factors. Solve unknown values, infer from area/volume via √/∛, and share 2D/3D visuals, steps, SVG, and…
- Simple harmonic motion (SHM) calculator
Free SHM calculator for a mass–spring oscillator and a small-angle pendulum. Compute period, angular frequency, max speed, acceleration, and energy with step-by-step formulas.
- Simple Harmonic Motion (SHM) simulator — with steps and energy | CalcBE
Simulate spring-mass simple harmonic motion with analytic, Euler-Cromer, or RK4 steps, inspect omega, period, energy, shareable logs, plots, and CSV exports.
- Simultaneous equations solver with graph view | CalcBE
Solve simultaneous linear equations with elimination, substitution, and graph views. Fractions and decimals are normalized, no solution or infinite solution is classified, and you can copy a shareable URL, LaTeX, and…
- Snell's law & total internal reflection calculator
Interactive Snell's law calculator for refraction and critical angle, including total internal reflection checks and step-by-step explanation.
- Solubility product (Ksp) & precipitation calculator | CalcBE
Compute molar solubility from Ksp, recover Ksp from measured solubility, test Q vs Ksp for precipitation, and explore simple fractional precipitation ranges.
- Solution recipe calculator – volume & concentration | CalcBE
Generate lab-ready solution recipes from solids or stock solutions, including simple and serial dilutions, with clear step-by-step instructions and shareable URLs.
- Split PDF files – extract page ranges or every N pages locally in your browser | CalcBE
Split a PDF into multiple files directly in your browser. Use page ranges, one-per-page, or every N pages—download results as a ZIP with no uploads.
- Square root simplifier with factor tree & steps | CalcBE
Simplify square roots to a√b with factor tree, pairing highlights, and steps. Show decimals with square bounds, load examples, copy LaTeX, and export SVG.
- Standard calculator – basic arithmetic with history tape and memory keys | CalcBE
Perform four‑function math with parentheses and percent, a running tape, and memory slots—fully keyboard accessible, with a shareable result link.
- Standing waves calculator: vibrating strings and air columns
Free standing wave calculator for strings and tubes. Enter length, tension & density or sound speed to list mode frequencies, wavelengths, and steps instantly.
- Stars and bars calculator – count integer solutions | CalcBE
Count the number of integer solutions to x1+…+xk=n with conditions (xi≥0, xi≥1, or xi≥ai), also known as combinations with repetition (multichoose). Shows the formula (C(n+k-1,k-1), etc.), short steps, examples, and a…
- Step-by-step solution PDF exporter — multi-language, A4/Letter, shareable JSON
Build printable How it's calculated guides with numbering styles, attachments, and A4/Letter layouts. Export JSON, copy doc= base64url links, and print classroom-ready PDFs.
- Stochastic process visualizer – random walk & Markov chain | CalcBE
Visualize random walks (1D/2D) and Markov chains from a transition matrix. See trajectories, MSD, and stationary distribution, then download results.
- Stoichiometry and limiting reactant calculator – moles, masses and percent yield | CalcBE
Free stoichiometry calculator to find the limiting reactant, theoretical yield, remaining amounts, and percent yield from a balanced chemical equation.
- Surface & volume nets (prism/pyramid/cylinder/cone/sphere) | CalcBE
Compute surface area and volume for prisms, pyramids, cylinders, cones, and spheres with synced 3D sketches and nets. See lateral vs base breakdowns, slant height, units, teacher mode, examples, shareable URLs, and SV…
- Taylor & Maclaurin Series — with steps and graphs | CalcBE
Build Taylor and Maclaurin polynomials P_n(x) with symbolic derivatives or fallback fits, then compare f and P_n on one graph. Review error summaries and step-by-step working for each example.
- Team generator – random teams & groups | CalcBE
Split a list of names into random teams or groups in your browser. Choose number of teams or team size, add simple constraints, then copy or download results. Share settings only (no names in URLs by default).
- Text Case Converter | Upper, lower, title, snake/camel/kebab
Convert text between upper, lower, title, sentence, snake_case, camelCase, and kebab-case instantly in your browser.
- Thermodynamic process & PV diagram calculator (ideal gas)
Free thermodynamic process calculator for ideal gases. Compute work, ΔU, and heat for isothermal, isobaric, isochoric, adiabatic, and polytropic processes, and see the PV diagram.
- Token generator – secure random strings (base64url, hex) | CalcBE
Generate secure random tokens and random strings locally in your browser. Choose base64url, hex, or a custom charset. Copy, download, and share settings (no tokens in URLs).
- Triangle Solver — Law of Sines/Cosines (SSA ambiguous) | CalcBE
Solve triangles with SSS, SAS, ASA/AAS, and the ambiguous SSA case. See step-by-step formulas, switch degree/radian output, pick decimal places, and view an annotated diagram.
- Triangle Solver (SSS / SAS / ASA, Area & Circumradius) | CalcBE
Select the known combination (three sides, two sides plus the included angle, or two angles plus the included side) and this tool will compute the remaining.
- TRPG dice check – d20 advantage/disadvantage and dice pool successes | CalcBE
Run quick d20 checks with advantage or disadvantage, compare against a DC, and roll dice pools to count successes directly in your browser. Keep rolls local, save history, and share logs as text, PNG cards, or prefill…
- Truth Table & Logic Evaluator — DNF/CNF Simplifier | CalcBE
Build Boolean truth tables up to 10 variables, export canonical DNF/CNF, simplify with Karnaugh or Quine–McCluskey, and share CSV or URL with How it’s calculated steps.
- Unit Circle & Trig Explorer — amplitude, period & phase | CalcBE
Explore y = A·f(bx+φ)+D for sine, cosine and tangent, syncing the unit circle and graph as you change amplitude, period and phase. Export sample values or share an interactive state.
- UUID Generator (v4/v7) – bulk, format, validate, and parse | CalcBE
Generate UUID v4 or UUID v7 in bulk, format them (canonical/URN/braces), copy or download, and validate UUIDs with v7 timestamp decoding—runs locally in your browser.
- Vector Calculator — dot/cross, projection, angle, area, triple (with steps) | CalcBE
Compute norms, dot, cross (2D/3D), projection, angle, areas, and triple product with step-by-step logs. 2D diagram, shareable URL, LaTeX and CSV export.
- Verifiable random draw (commit-reveal) – auditable picker | CalcBE
Run a verifiable random draw using a commit-reveal scheme. Publish a commitment hash first, reveal the seed later, and let anyone reproduce and verify the results—runs locally in your browser.
- Voltage divider & LC resonance calculator – gain & cutoff | CalcBE
Design DC voltage dividers with loading and reverse solves, and compute LC resonance, reactance, Q and bandwidth with SI prefixes, E-series rounding and CSV export for lab or hobby projects.
- Weighted Random Picker – random choice with weights | CalcBE
Pick random items with weights (probability ratios). Use an optional seed for reproducible draws and share your setup via URL—runs locally in your browser.
- Word Problem Wizard — percent, ratio, speed & concentration | CalcBE
Solve common word problems by choosing a template and entering values with units. Get diagrams, formulas, step-by-step hints, and checks for percent, ratio, speed, and salt-solution concentration.
- Work, energy & power calculator
Physics calculator for work, kinetic and potential energy changes, and average power. See how force, displacement, mass, speed and height relate in one place.
- Zenkaku / Hankaku Converter | Kana, fullwidth, halfwidth
Convert Japanese text between fullwidth and halfwidth characters, and between Hiragana and Katakana, entirely in your browser.
Education & study
Plan GPA scenarios, track coursework, and set targets for final exams.
- GPA Calculator (Weighted & Unweighted Course Average) | CalcBE
Compute weighted and unweighted GPA with editable scales, Honors/AP bumps, and shareable course tables. Includes how the math works and FAQs.
- GPA & Final Grade Needed Calculator (Weighted & Unweighted) | CalcBE
Calculate term and cumulative GPA (weighted and unweighted), convert letter and percent grades, and see the final exam score required to hit a target grade.
- CGPA ↔ Percentage Converter (Educational)
Convert between CGPA and percentage using example mappings (9.5×CGPA or 10×CGPA). Institutions differ—always confirm your institution’s rule.
- Deviation Score (T-score) & Percentile Calculator | CalcBE
Calculate z-score, deviation score (T-score / hensachi), and percentile. Supports input from mean & standard deviation, or from a score list / frequency table.
- CalcBE embed widget & share link builder (base64url cfg)
Generate prefilled CalcBE share URLs and responsive iframe embeds with base64url cfg, optional hash mode, UTM tags, and auto-height snippets for LMS and blogs.
- Number line & interval visualizer (inequality shading)
Shade inequalities and interval unions on an interactive SVG number line. Visualize algebra steps, export SVG/PNG, and copy share-ready URLs for lessons.
- Quick charts from pasted data — scatter / box plot + regression (with steps, PNG/PDF)
Paste spreadsheet data to generate scatter and box plots instantly. Includes OLS, Theil–Sen, and polynomial regression with step-by-step math plus PNG/PDF export.
- Worksheet & Quiz Auto-Generator (steps & PDF)
Worksheet & quiz auto-generator with steps (PDF) - linear, quadratic, factoring, fractions, ratios. Deterministic seed for reproducible class handouts.
Life & health
Track personal indicators while keeping privacy and control offline.
- BMI calculator – body mass index in metric units | CalcBE
Enter your weight and height to calculate your BMI, see the WHO category, and copy a shareable result link. Informational only—no medical diagnosis.
- Ideal weight calculator – Devine, Hamwi and BMI ranges for adults | CalcBE
Estimate ideal body weight with the Devine, Hamwi, Robinson and Miller formulas, set a custom BMI goal, and compare kg/lb outputs. Informational only.
- Body Fat Percentage Calculator | US Navy & BMI | CalcBE
Estimate your body fat percentage using US Navy circumference and BMI (Deurenberg) methods. Switch between metric and US units, see estimated fat and lean mass, and use this free calculator to track your fitness and h…
- Pregnancy Due Date Calculator | EDD & Gestational Age | CalcBE
Estimate your due date, track gestational age today, and see trimester and term milestones from LMP, conception, IVF transfer, or ultrasound inputs. Informational only.
- 1RM (One-Rep Max) & Training Weight Calculator | CalcBE
Estimate your 1RM from weight and reps using common formulas, then convert to training weights by %1RM or target reps. Includes rounding options and Training Max (TM).
- Calorie & Weight-loss Planner | TDEE, Targets, Timeline | CalcBE
Estimate your TDEE, set a calorie target to hit your goal weight by a chosen date, or see how long it will take at your current intake. Includes macro split guidance. Informational only.
- Heart Rate Zone Calculator | CalcBE
Calculate heart rate training zones (Zone 1-5) with %HRmax, Karvonen (HRR), or optional %LTHR. Age-based HRmax estimates, Zone 2 highlight, copy/share, and custom boundaries included.
Cooking & kitchen
Convert recipe measurements, scale batches, and stay organised in the kitchen.
- Cooking converter – cups ↔ grams, ingredient density and recipe scaling | CalcBE
Convert between cups, tablespoons, teaspoons, milliliters, grams, ounces, and more. Scale whole recipes with a single slider.