Featured

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.
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).

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.
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.
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.
Bell numbers table with Stirling relations | CalcBE
Generate a Bell numbers table B(n) and confirm the relation B(n)=ΣS(n,k). Includes exact BigInt or modulo mode, CSV/TSV export, Stirling tabs, and shareable URLs.
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…
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).
Catalan number explorer - Dyck paths & trees | CalcBE
Explore Catalan numbers C_n with exact BigInt or modulo tables, then enumerate or uniformly sample Dyck words, Dyck paths, and full binary trees. Export CSV or share URLs with seeds for reproducible examples.
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…
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.
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.
Coupon collector calculator (expected draws) | CalcBE
Solve the coupon collector problem: expected draws, t50/t90/t99, P(T≤t), weighted rarities, and a reproducible Monte Carlo simulation.
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.
Data visualization: quick charts, histograms, regression | CalcBE
Charts and summaries: quick charts, histograms, box plots, and regression. Paste data, export PNG/PDF/CSV — runs locally in your browser.
Date & Time Calculators: Days Between, Business Days, Time Zones | CalcBE
Calculate days between dates, add/subtract time, count business days, and convert time zones. Browser-only.
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.
Dev & data tools: JSON, UUID, subnet/CIDR, random CSV | CalcBE
Developer utilities: JSON formatting, UUIDs, subnet/CIDR, random CSV test data, and text tools. Browser-only, no sign-in.
Dice roller (d4–d100) with PNG sharing | CalcBE
Roll d4–d100 with quick buttons or 2d6+3 notation. See totals and breakdowns, save history, and share as text or PNG — all in your browser.
Dice stats (odds & distribution) + PNG sharing | CalcBE
Compute odds and distributions for NdS +/- K. Auto switches Exact/Sim, shows a histogram, and lets you share as text, PNG, or URL — in your browser.
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.
Distribution calculator – binomial, Poisson, t, chi-square | 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.
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.
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.
Fast, multilingual calculators | CalcBE
Search CalcBE calculators across all languages. Do quick math on the home calculator or open tools for finance, unit conversion, date & time and more.
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.
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 — step-by-step (Euclid & ladder) | CalcBE
Compute GCD (greatest common divisor) and LCM (least common multiple) with step-by-step Euclidean algorithm, ladder method, and extended Euclid.
Geometry & Graph Tools: Triangles, Vectors, 2D/3D | CalcBE
Solve triangles, work with vectors, and use graph helpers like graph paper and number lines. Browser-only geometry tools.
Health & fitness calculators — BMI, calories, body fat | CalcBE
Estimate BMI, body fat %, BMR/TDEE calories, ideal weight, heart rate zones, and due dates. Runs in your browser; educational use only.
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.
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.
Integer composition calculator - counts, k parts | CalcBE
Calculate integer compositions where order matters. Get counts for 2^(n-1), exactly k parts, bounded parts, or nonnegative k parts. Includes tables, small-n enumerations, uniform samples with seeds, CSV/TSV exports, a…
Integer partition calculator - p(n), k parts | CalcBE
Calculate integer partitions p(n) with options for exactly k parts, max part m, distinct/odd/even parts, and bounded ranges. Includes tables, small-n enumerations, uniform samples with seeds, Ferrers diagrams, CSV/TSV…
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…
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.
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.
Loan & Mortgage Calculators: Payment, Schedule, Affordability | CalcBE
Estimate payments, compare amortization schedules, and check affordability (DTI) with browser-only loan & mortgage calculators.
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 (Steps, Quotient, Remainder) | CalcBE
See quotient, remainder, and long division steps. Supports decimals and repeating decimals, plus a shareable URL and LaTeX copy.
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…
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.
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.
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.
nCr & nPr calculator (permutations & combinations) | CalcBE
Compute nCr (combinations), nPr (permutations), and factorial (n!). Exact BigInt results, step logs, teacher mode, and shareable links.
Normal Distribution & Z-Score Calculator – CDF, PDF, quantiles | CalcBE
Compute normal distribution CDF/PDF, z-scores, tail probability, intervals, and quantiles from mean (μ) and standard deviation (σ). Includes a shaded curve and steps.
Paint & Coating Calculators (Coverage, Area, Cost, DFT/WFT) | CalcBE
Estimate paint amount (L/gal), coverage, cans, exterior/roof/fence/deck areas, paint cost, and industrial DFT/WFT—browser-only.
Paper & templates: graph paper, notes, worksheets | CalcBE
Printable paper templates: graph paper, notes, worksheets, and planners. Generate precise SVG and print to PDF — runs locally in your browser.
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.
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.
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).
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.
Poker probability calculator — odds, outs, Hold'em hands | CalcBE
Poker probability calculator for hand odds, outs hit rates (turn/river), and Texas Hold'em hand distributions. Free, shareable URLs, CSV export.
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 & simulation tools | CalcBE
Probability simulators and calculators for trees, combinatorics, distributions, and Monte Carlo intuition. Browser-only, no sign-in.
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.
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.
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 & Lotteries: Pickers, Dice, Probability | CalcBE
Find the right random tool fast: weighted random picker, random picker, dice tools, plus probability calculators. Browser-only, no sign-in.
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 Solver — Steps + Percent | CalcBE
Simplify ratios, solve proportions, and convert percentages with step-by-step working. Teacher mode, LaTeX export, and shareable links.
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.
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.
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…
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…
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…
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 (history tape & memory) | CalcBE
Perform four‑function math with parentheses and percent, a running tape, and memory slots—fully keyboard accessible, with a shareable result link.
Stars and bars calculator — multichoose formulas | CalcBE
Count integer solutions to x1+…+xk=n (xi≥0, xi≥1, or xi≥ai). Includes formulas, short steps, examples, and shareable links.
Statistics (inference & tests) | CalcBE
Inference tools for confidence intervals, hypothesis tests, regression, and uncertainty. Browser-only, no sign-in.
Statistics & Probability (overview): Inference, Simulation, Charts | CalcBE
Overview hub for statistics & probability. For focused lists, open Inference & tests, Probability & simulation, or Data visualization.
Stirling numbers table (first & second kind) | CalcBE
Generate tables for Stirling numbers of the first and second kind plus Bell numbers. Inspect S(n,k), s(n,k), c(n,k), meanings, recurrences, exact BigInt or modulo values, CSV/TSV export, and shareable URLs.
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.
Study & Classroom Tools: Worksheets, Graph Paper, GPA | CalcBE
Classroom-ready tools: worksheet generator, graph paper, quick charts, plus GPA and stats calculators. Browser-only.
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…
Tax Calculators: VAT, GST, Income Tax, Net ↔ Gross | CalcBE
Quick tax calculators for VAT/GST, net↔gross conversions, and income tax. Browser-only, no sign-up.
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).
Topics & Collections | CalcBE
Browse CalcBE topic collections to quickly find the right calculator or tool (random draws, PDFs, loans, taxes, and more).
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/d100, pools) with PNG sharing | CalcBE
Run d20/d100 checks with advantage/disadvantage, compare vs DC, and roll dice pools to count successes. Share as text, PNG, or URL — all in your browser.
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.
Unit Conversion Calculators: Length, Temperature, Currency | CalcBE
Convert measurement units fast: unit converter, length, temperature, currency, and base conversion. Browser-only, no sign-in.
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.
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.

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