Math & statistics calculators

0-9

• 2D geometry calculator – area & perimeter of shapes.
  Compute area and perimeter for rectangles, circles, triangles, trapezoids and regular polygons from side lengths.
• 2D graphing calculator – plot and intersect functions.
  Plot up to three functions, find intercepts, intersections and extrema numerically, and explore the graph with zoom.
• 3D Geometry Calculator (Sphere, Cylinder, Cone, Prism).
  Compute volume and surface area for spheres, cylinders, cones, rectangular and regular prisms—with example inputs.

A

• About CalcBE | Mission, Quality Policy & Sources.
  Learn who runs CalcBE, how calculator quality is reviewed, how formulas and sources are chosen, and where professional.
• Algebra simplifier with colors for like terms.
  Expand with distribution, color-match like terms, and simplify step by step.
• Arithmetic & Geometric Sequence Calculator.
  Compute the nth term, partial sum, common difference or ratio, and number of terms for arithmetic and geometric.

B

• Base Converter & Bitwise Toolkit (Bin/Oct/Dec/Hex).
  Convert between binary, octal, decimal, and hexadecimal, and run AND/OR/XOR/NOT and bit shifts—then copy.
• Bell numbers table with Stirling relations.
  Generate a Bell numbers table B(n) and confirm the relation B(n)=ΣS(n,k).
• Beta Distribution Generator & Visualizer.
  Generate random samples from a Beta distribution and visualize the PDF and histogram.
• Birthday paradox (collision probability) calculator.
  Calculate the birthday paradox collision probability with exact math + a Monte Carlo simulator.
• Bonds & Rates Calculators (YTM, Duration, DV01).
  Compare calculators for bond price, yield to maturity, duration, DV01, and rate conversion in one place.

C

• Card deck shuffler – shuffle & draw cards.
  Shuffle a deck of playing cards and draw or deal cards in your browser.
• Catalan number explorer - Dyck paths & trees.
  Explore Catalan numbers C_n with exact BigInt or modulo tables, then enumerate or uniformly sample Dyck words, Dyck.
• Circular & necklace permutation calculator.
  Compute circular permutations (rotation counted as the same) and necklace/bracelet permutations (rotation + reflection.
• Combinations With Repetition Calculator (Stars and Bars).
  "Count.
• Complex Number Calculator — a+bi ↔ polar with steps.
  Convert between a+bi and r∠θ, perform complex addition, subtraction, multiplication, division, powers, and list n-th.
• Confidence Interval & Hypothesis Test Wizard.
  Build confidence intervals and hypothesis tests for means and proportions with t/z workflows, Welch, paired, Wilson.
• Conic sections calculator – standard form & focus.
  Classify a general quadratic, rotate to eliminate xy, complete the square to standard form, and visualize focus.
• Coordinate geometry calculator – distance & lines.
  Compute distance, midpoint, slope, line equations, circles, and intersections with full working shown beside.
• Coupon Collector Calculator (Expected Draws, t90,.
  Solve the coupon collector problem with expected draws n·H_n, completion probability P(T≤t), and t50/t90/t99.

D

• Data Transfer Time Calculator (Size, Speed, Time).
  Calculate transfer time, required speed, or transferable data size with bit/byte and SI/IEC unit conversion plus.
• Data visualization: quick charts, histograms, regression.
  Charts and summaries: quick charts, histograms, box plots, and regression.
• Descriptive Statistics + Box Plot & Histogram.
  Paste a dataset or upload CSV/TSV to review descriptive statistics, histogram, box plot, outlier counts, trimmed mean.
• Dev & data tools: JSON, UUID, subnet/CIDR, random CSV.
  Developer utilities: JSON formatting, UUIDs, subnet/CIDR, random CSV test data, and text tools. Browser-only, no.
• Dice roller (d4 to d100, 2d6+3, PNG).
  Roll d4 to d100 or use notation like 2d6+3.
• Dice stats (odds & distribution) + PNG sharing.
  Compute odds and distributions for NdS +/- K.
• Differentiation Calculator (steps, tangents, numeric).
  Compute symbolic and numeric derivatives for single-variable, parametric, implicit, and partial derivatives.
• Dirichlet Distribution Generator & Visualizer.
  Generate probability vectors from a Dirichlet distribution and visualize marginals and simplex plots.
• Distributions — binomial, Poisson, t, chi square.
  Compute PMF or PDF, CDF, quantiles, and exact intervals for binomial, Poisson, Student t, and chi-square.

E

• Eigenvalues & Eigenvectors (2x2, 3x3) — with steps.
  Compute eigenvalues, eigenvectors, residuals, and multiplicities for 2x2 and 3x3 matrices with analytic.
• Error Propagation Calculator with Steps.
  Propagate uncertainty for sums, products, powers, and custom formulas with gradient×covariance steps, correlation.

F

• First-Order ODE Solver (Separable + Linear).
  Solve separable and linear first-order ODEs with slope fields, integrating factors, Simpson integrals, numeric.
• Fraction calculator.
  Enter mixed or improper fractions as-is, perform addition, subtraction, multiplication, or division, and instantly.
• Fraction Simplifier & Mixed Number Converter.
  Reduce any fraction, convert between improper and mixed numbers, and review Euclidean GCD steps with pie and number.
• Free multilingual calculators & converters.
  Free multilingual calculators & converters.
• Function Transformations Calculator.
  Graph function transformations from the parent graph.

G

• GCD & LCM calculator – greatest common divisor tool.
  Compute the GCD and LCM for up to 32 integers using Euclid’s algorithm and successive reduction.
• GCD & LCM Calculator — step-by-step.
  Compute GCD (greatest common divisor) and LCM (least common multiple) with steps Euclidean algorithm, ladder method.
• Geometry & Graph Tools: Triangles, Vectors, 2D/3D.
  Solve triangles, work with vectors, and use graph helpers like graph paper and number lines. Browser-only geometry.

H

• Histogram & cumulative frequency from grouped data.
  Enter grouped or raw data to build a derived frequency table, histogram (frequency or frequency density).
• Hypergeometric probability calculator without replacement.
  Calculate exact probability, cumulative tails, and ranges for hypergeometric draws without replacement.

I

• Inclusion–Exclusion — at least one & none.
  Compute |A∪B∪…| (“at least one”) for 2–4 sets. For 2–3 sets you can input Venn regions (easy) or intersection sizes.
• Inequality Solver for 1D & 2D.
  Solve linear, compound, absolute value, quadratic, and rational inequalities with shareable steps, plus half-plane.
• Integer composition calculator - counts, k parts.
  Calculate integer compositions where order matters. Get counts for 2^(n-1), exactly k parts, bounded parts.
• Integer Partition Calculator (p(n), exactly k parts).
  Calculate integer partitions p(n) with options for exactly k parts, max part m, distinct parts, odd/even parts.
• Integration Calculator (numeric methods + steps).
  Compute definite integrals with trapezoid, Simpson, adaptive, Gaussian, and Monte Carlo methods.
• Inverse proportion y=k/x explorer | signs & k.
  Explore y = k/x with synchronized formula, table, and graph.
• Investing & Wealth Building (NISA/SIP/Compound/Retirement).
  Compare long-term investing scenarios for NISA, SIP, compound growth, retirement, and savings goals.

L

• LaTeX Equation Editor — Live MathJax, palette, templates.
  A premium LaTeX equation editor with live MathJax preview, caret-aware palette, templates, history, and one-tap.
• Limits Explorer — one-sided limits and numeric LHopital.
  Check indeterminate forms, sample one-sided limits, apply numeric LHopital steps, and view the graph near.
• Linear Equation Solver (Step by Step).
  Linear equation solver that logs each same-operation step.
• Linear function y=ax+b explorer | formula & graph.
  Explore y = ax + b with synchronized formula, table, and graph.
• Linear Regression & Correlation — Scatter, OLS/WLS, R².
  Paste x,y[,w] data or upload a CSV to fit OLS, WLS or Theil–Sen regression.
• Linear systems solver – 2×2 and 3×3 equation systems.
  Solve 2×2 and 3×3 systems of linear equations with Gaussian elimination (RREF), classify solutions, show parametric.
• Linear Systems Solver with RREF Steps (2×2 & 3×3).
  Reduce 2×2 and 3×3 linear systems with Gaussian or Gauss-Jordan elimination, log every row operation, keep exact.
• Loan & Mortgage Calculators: Payment, Schedule.
  Estimate payments, compare amortization schedules, and check affordability (DTI) with browser-only loan & mortgage.
• Log Laws Transformer (with steps) — expand, condense.
  Expand, condense, and evaluate logarithms with shareable steps.
• Long addition & subtraction (decimal carry/borrow).
  See column addition or subtraction with decimals, carry, and borrow explained per digit.
• Long Division Calculator With Steps, Remainders & Decimals.
  Use this long division calculator with steps to show the quotient, remainder, decimal answer, repeating digits.
• Lottery odds & probability calculator (EV, jackpot, 1 in X).
  Calculate lottery winning odds by prize tier, including jackpot probability, 1 in X, expected value (EV).

M

• Matrix Calculator — RREF / Solve Ax=b / Inverse.
  Compute RREF, solve Ax=b, find the inverse, determinant, rank, null space, row and column spaces with detailed.
• Mean and Standard Deviation Calculator.
  Paste or type your dataset to compute count, mean, variance, and standard deviation (population N and sample N‑1).
• Modular arithmetic calculator – GCD, inverse & CRT.
  Compute extended GCD, modular inverses, fast power, CRT and linear congruences with BigInt precision.
• Multiset permutation calculator.
  Count distinct permutations when items repeat (anagram count) using n!/(n1!...nk!).

N

• nCr & nPr calculator (permutations & combinations).
  Compute nCr (combinations), nPr (permutations), and factorial (n!).
• Normal Distribution Calculator: z-Score, CDF & Percentile.
  Calculate normal distribution probabilities, z-scores, percentiles, and inverse normal cutoffs from mean and standard.

P

• Paint and Coating Calculators.
  Estimate paint amount (L/gal), coverage, cans, exterior/roof/fence/deck areas, paint cost, and industrial.
• Paper & templates: graph paper, notes, worksheets.
  Printable paper templates: graph paper, notes, worksheets, and planners.
• Partial fractions calculator – decomposing rational.
  Decompose rational functions into partial fractions with polynomial long division, Durand-Kerner factorisation.
• Pascal's Triangle & Binomial Expansion (with steps).
  Generate Pascal rows, combinations, and binomial expansions with BigInt accuracy.
• Password generator – strong secure random passwords.
  Generate strong random passwords in your browser with crypto.getRandomValues.
• Pattern String Generator — business IDs & sequences.
  Generate business-style IDs from a pattern (date, sequence, random).
• Percentage Calculator (X% of Y, increase/decrease).
  Work out X% of Y, what percent one number is of another, and the new value after a percent increase or decrease.
• Permutation test – exact p-value for A/B and paired.
  Run a permutation (randomization) test for two independent groups or paired samples.
• Pi Algorithm Race | Compare Gregory, Nilakantha, Machin,.
  Race Gregory, Nilakantha, Machin-like, and Chudnovsky pi algorithms with fixed-time and fixed-digits modes, charts.
• Pi Approximation Explorer | Polygons, series, Monte Carlo.
  Compare polygon, Gregory, Nilakantha, and Monte Carlo approximations of pi with charts, errors, examples.
• Pi Digit Lab | Search and jump within the first n digits of pi.
  Search for a digit sequence, jump to a position, move block by block, and copy a selected range inside the first n.
• Pi Digits Generator | First n digits with Chudnovsky.
  Generate the first n digits of pi with a Chudnovsky-based browser tool.
• Pi lab.
  Explore how pi is approximated with polygons, series, and simulation.
• Poker odds calculator.
  Calculate Texas Hold'em odds in one place: hand probability, outs hit rate, and equity versus random opponents, using.
• Prime factorization calculator – exponents, divisors,.
  Factor any positive integer into primes, see exponents, divisor counts, the largest prime factor, and copy a shareable.
• Prime Factorization with Steps & Factor Tree.
  Factor any integer into primes, see every trial division step, compute τ(n), σ(n), φ(n), and draw the factor tree.
• Probability & simulation tools.
  Probability simulators and calculators for trees, combinatorics, distributions, and Monte Carlo intuition.
• Probability Simulator — coin, dice, roulette.
  Simulate coin tosses, dice rolls and roulette spins with a fixed seed to compare theoretical and empirical.
• Probability tree & 2×2 table — AND/OR & complement.
  Probability tree & 2×2 table tool for AND/OR/NOT and complements.
• Pythagorean theorem calculator | Diagram & area model.
  Solve and visualize a²+b²=c² with a right-triangle diagram and area model.

Q

• Quadratic & Polynomial Solver with Steps.
  Solve quadratic and degree-3 polynomial equations with exact and decimal roots, discriminant checks, factorization.
• Quadratic equation solver – roots, discriminant.
  Solve ax² + bx + c = 0 and see real or complex roots, the discriminant, vertex form and a quick graph.

R

• Random & Lotteries: Pickers, Dice, Probability.
  Find the right random tool fast: weighted random picker, random picker, dice tools, plus probability calculators.
• Random CSV generator – test data & schema JSON.
  Generate random CSV test data in your browser.
• Random Date Generator, Time Generator & Datetime Generator.
  Generate random dates, random times, or random datetimes with ranges, weekday filters, exclusions, time windows.
• Random distributions: samplers, tests & visualizers.
  Generate random samples from distributions, visualize histograms, and sanity-check randomness in your browser.
• Random JSON Generator (Test Data) — array & NDJSON.
  Generate JSON test data from a schema. Export as JSON array or NDJSON.
• Random Log Generator — Nginx, Apache & JSON logs.
  Generate fake access logs (Nginx/Apache) or JSONL logs with controllable distributions.
• Random number generator (integers, decimals, seed).
  Generate random numbers in your browser: integers or decimals, optional seed, unique mode, and one-click copy.
• 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.
• Random SQL INSERT Generator — Postgres, MySQL, SQLite.
  Generate SQL INSERT statements from a schema for Postgres, MySQL, or SQLite.
• Random test data generators (CSV, IDs, time).
  Create CSV test data, random IDs, and timestamps locally in your browser. No uploads; share settings-only URLs.
• Random tools – generators, pickers, shuffles.
  Random generators and pickers that run entirely in your browser: numbers, dates, CSV test data, tokens, UUIDs.
• Random Walk & Markov Chain Visualizer.
  Run random walk (1D/2D/3D) and Markov chain simulations in your browser.
• Randomness beacon verifier – paste a beacon to verify.
  Paste a public beacon value to verify a deterministic draw or shuffle.
• Randomness Test Tool (chi-square, runs, ACF, JB).
  Run chi-square, runs, autocorrelation, and Jarque-Bera tests on bit or number sequences.
• Ratio & Proportion Solver — Steps + Percent.
  Simplify ratios, solve proportions, and convert percentages with steps working. Teacher mode, LaTeX export.
• Real Estate (Mortgage/Amortization/Affordability).
  Estimate mortgage payments, amortization schedules, and affordability (DTI) together. Compare assumptions and save.
• Repetition calculator – n^r & nHr (multichoose).
  Calculate permutations with repetition (n^r) and combinations with repetition (nHr = C(n+r-1,r)) with Exact BigInt.
• Riemann Sums Calculator | Left/Right/Trapezoid/Simpson.
  Visualise left/right, midpoint, trapezoid and Simpson sums for f(x), compare with an adaptive Simpson reference.
• Rounding & error bands | Intermediate vs final.
  Round any number, highlight the digit you inspect, and see the error band on a number line.

S

• Sampling & Bootstrap — CLT Explorer (with steps).
  Simulate samples from common distributions, bootstrap means or proportions, and see CLT histograms with steps.
• Scientific calculator – trig, logs, powers and degree.
  Run trig, logs, exponents, and factorials with Deg/Rad modes, keyboard input, memory, and a shareable URL that.
• Seating Chart Generator (Random) — Classroom & Tables.
  Free online seating chart generator for classrooms and events.
• Sector arc length, area & angle calculator.
  Solve a sector’s arc length l, area A, central angle θ, or radius r with units and a live diagram.
• Sequences & Series (Arithmetic / Geometric) — terms.
  Compute arithmetic and geometric sequences with steps logs: nth terms, partial sums, solving for n or k, two-point.
• Shuffle bias comparison – naive vs Fisher–Yates.
  "Compare.
• Signed number line calculator & sign rules.
  Add, subtract, multiply, and divide signed numbers with a number-line animation for plus/minus moves.
• Similarity ratio calculator – side, area, volume.
  Enter a similarity ratio (small:large) to see side/perimeter, area (square), and volume (cube) ratios with scale.
• Simultaneous Equations Solver (steps + graph).
  Solve two linear equations with elimination, substitution, and graph views.
• Square root simplifier with factor tree & steps.
  Simplify square roots to a√b with factor tree, pairing highlights, and steps.
• Standard calculator (history tape & memory).
  Perform four‑function math with parentheses and percent, a running tape, and memory slots—fully keyboard accessible.
• Statistics (inference & tests).
  Inference tools for confidence intervals, hypothesis tests, regression, and uncertainty. Browser-only, no sign-in.
• Statistics & Probability (overview): Inference.
  Overview hub for statistics & probability.
• Stirling numbers table (first & second kind).
  Generate Stirling numbers of the first and second kind, plus Bell numbers, with fast table output, recurrence details.
• Study & Classroom Tools: Worksheets, Graph Paper, GPA.
  Classroom-ready tools: worksheet generator, graph paper, quick charts, plus GPA and stats calculators. Browser-only.
• Surface & volume nets.
  Compute surface area and volume for prisms, pyramids, cylinders, cones, and spheres with synced 3D sketches and nets.
• Synthetic Time Series Generator — trend, seasonality.
  Generate synthetic time series data with trend, seasonality, noise, missing values, and outliers.

T

• Tax Calculators: VAT, GST, Income Tax, Net ↔ Gross.
  Quick tax calculators for VAT/GST, net↔gross conversions, and income tax. Browser-only, no sign-up.
• Taylor & Maclaurin Series — with steps and graphs.
  Build Taylor and Maclaurin polynomials P_n(x) with symbolic derivatives or fallback fits, then compare f and P_n.
• Team generator – random teams & groups.
  Split a list of names into random teams or groups in your browser.
• Topic Hubs for Calculators and Tools | Find by Task.
  Use topic hubs to find the right calculator or tool by task: money, study, time, conversions, PDF work, random.
• Triangle Solver (SSS / SAS / ASA, Area & Circumradius).
  Select the known combination (three sides, two sides plus the included angle, or two angles plus the included side).
• Triangle Solver (SSS, SAS, ASA, SSA) with steps.
  Solve a triangle from sides and angles with SSS, SAS, ASA/AAS, or SSA.
• Triangular Distribution Generator (min/mode/max).
  Generate samples from a triangular distribution using min/mode/max and visualize the PDF and histogram.
• TRPG dice check (d20/d100, pools) with PNG sharing.
  Run d20/d100 checks with advantage/disadvantage, compare vs DC, and roll dice pools to count successes.
• Truncated Normal Generator & Visualizer.
  Generate samples from a truncated normal distribution with lower/upper bounds and visualize the PDF/CDF and histogram.
• Truth Table & Logic Evaluator — DNF/CNF Simplifier.
  Build Boolean truth tables up to 10 variables, export canonical DNF/CNF, simplify with Karnaugh or Quine–McCluskey.

U

• Unit Circle & Trig Explorer — amplitude, period & phase.
  Explore y = A·f(bx+φ)+D for sine, cosine and tangent, syncing the unit circle and graph as you change amplitude.

V

• Vector Calculator — dot/cross, projection, angle, area.
  Compute norms, dot, cross (2D/3D), projection, angle, areas, and triple product with steps logs.
• Verifiable random draw (commit-reveal) – auditable.
  Run a verifiable random draw with a commit-reveal workflow, public seeds, and reproducible logs so participants can.

W

• Weibull Distribution Generator & Visualizer.
  Generate random samples from a Weibull distribution and visualize the PDF and histogram.
• Weighted Random Picker & Randomizer | Seeded Weighted Draws.
  Use this weighted random picker and randomizer to draw winners by weight, ratio, or raffle entries.
• Word Problem Wizard — percent, ratio, speed.
  Solve common word problems by selecting a template, entering values with units, and getting equations, diagrams.