Math & statistics calculators

0-9

• 2D geometry calculator – area & perimeter of shapes
  Compute area and perimeter for rectangles, circles, triangles, trapezoids, and regular polygons with formulas.
• 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

• A/B Test Significance Calculator
  Check A/B test results with conversion rates, lift, z-test p-value, confidence interval, and Bayesian win probability.
• Algebra simplifier with colors for like terms
  Expand with distribution, color-match like terms, and simplify step by step.
• Algebra Worksheet Generator
  Create printable algebra handouts with answer keys and optional worked steps.
• ANOVA Calculator
  Paste grouped raw values to run a one-way ANOVA, inspect the ANOVA table, F statistic, p-value, eta-squared.
• Arithmetic & Geometric Sequence Calculator
  Compute the nth term, partial sum, common difference or ratio, and number of terms for arithmetic and geometric.
• ARR NNT Calculator
  Calculate absolute risk reduction, relative risk reduction, and NNT or NNH from control and experimental event rates.
• Aspect Ratio Calculator
  Simplify image or video ratios, solve a missing width or height, and preview contain, cover, and crop behavior.
• Attributable Fraction Exposed Calculator
  Estimate attributable fraction among exposed and attributable percent among exposed from group risk, or from direct.
• Attributable Risk Calculator
  Compare exposed and unexposed groups to review attributable risk and attributable fraction together.
• Attributable Risk Percent Calculator
  Estimate attributable risk percent from exposed and unexposed risk, or from a direct attributable risk.

B

• Balanced Accuracy Calculator
  Calculate balanced accuracy, recall, specificity, precision, prevalence, and accuracy from TP, FP, TN, and FN.
• 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.
• Bayes Theorem Calculator
  Update a prior probability with Bayes' theorem.
• 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.
• Binomial Test Calculator
  Enter successes, trials, and a null proportion to read exact binomial-test p-values.
• Birthday Paradox Calculator (Collision Probability)
  Calculate the birthday paradox collision probability with exact math + a Monte Carlo simulator.

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.
• Chi-Square Test Calculator
  Run chi-square goodness-of-fit and independence tests from observed counts.
• Circular & necklace permutation calculator
  Compute circular permutations (rotation counted as the same) and necklace/bracelet permutations (rotation + reflection.
• Cohen's Kappa Calculator
  Calculate Cohen's kappa from paired labels or a contingency table.
• Column arithmetic learning hub
  Choose the column-arithmetic page for carries, borrowing, whole-number division, or decimal-point moves in the order.
• 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.
• Confusion Matrix Calculator
  Calculate confusion matrix metrics for binary classification from TP, FP, TN, and FN.
• 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.
• Correlation Calculator
  Paste XY pairs to calculate Pearson or Spearman correlation, two-sided p-value, squared coefficient, sample count.
• Coupon Collector Calculator (Expected Draws & Completion)
  Solve the coupon collector problem with expected draws n·H_n, completion probability P(T≤t), and t50/t90/t99.
• Cp Cpk Calculator - Process Capability, Pp Ppk, DPMO &
  Paste measurements or enter mean and SD with LSL/USL to calculate Cp, Cpk, Pp, Ppk, estimated PPM/DPMO and sigma level.

D

• Data visualization: quick charts, CSV profiling, regression
  Quick charts, CSV column profiling, histograms, box plots, and regression.
• Deadline Countdown Calculator
  See remaining calendar days, business days, and business hours until a deadline in one page.
• Decimal Long Division
  Learn decimal long division by separating the decimal shift, the transformed equation, and the long-division steps.
• Decimal Long Division
  Learn decimal long division step by step.
• Decimal Long Multiplication
  Learn decimal long multiplication by separating the whole-number multiplication from the step where the decimal point.
• Descriptive Statistics + Box Plot & Histogram
  Paste a dataset or upload CSV/TSV to review descriptive statistics, histogram, box plot, outlier counts, trimmed mean.
• Diagnostic Odds Ratio Calculator
  Calculate diagnostic odds ratio from TP, FP, TN, and FN.
• 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

• Effect Size Calculator
  Calculate Cohen's d, Hedges' g, or eta-squared from two-group summaries or one-way ANOVA summaries, then read.
• Eigenvalues & Eigenvectors (2x2, 3x3) — with steps
  Compute eigenvalues, eigenvectors, residuals, and multiplicities for 2x2 and 3x3 matrices with analytic.
• Entropy and KL Divergence Calculator
  Calculate entropy, cross-entropy, KL divergence, and JS divergence from probability vectors P and Q.
• Error Propagation Calculator with Steps
  Propagate uncertainty for sums, products, powers, and custom formulas with gradient×covariance steps, correlation.
• Expected Value Simulator
  Compare theoretical expected value, variance, and simulated averages for coin flips, dice, or simple lottery-style.

F

• F-Beta Score Calculator
  Calculate F-beta from precision and recall, or from TP, FP, and FN.
• Factor Pairs Calculator
  Enter a whole number to list every factor and factor pair.
• Find calculators in your language
  Choose your language or search across all CalcBE locales.
• First-Order ODE Solver (Separable + Linear)
  Solve separable and linear first-order ODEs with slope fields, integrating factors, Simpson integrals, numeric.
• Fisher Exact Test Calculator
  Enter one 2x2 table to read Fisher exact test p-values in two-sided, greater, or less form.
• 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.
• Friedman Test Calculator
  Run a Friedman test for 3+ paired groups. Review Q, the p-value, tie correction, Kendall's W, and rank summaries.
• 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.

H

• Histogram & cumulative frequency from grouped data
  Enter grouped or raw data to build a derived frequency table, histogram (frequency or frequency density).
• How to Do Long Multiplication
  Learn long multiplication with short, child-friendly steps.
• Hypergeometric probability calculator without replacement
  Calculate hypergeometric probabilities without replacement, including P(X=10) for N=60, K=35, n=15.

I

• Inclusion–Exclusion — at least one & none
  Compute.
• 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
  Explore y = k/x with synchronized formula, table, and graph.

K

• Kruskal-Wallis Test Calculator
  Run a Kruskal-Wallis test for 3+ independent groups. Review H, the p-value, tie correction, and rank summaries.

L

• LaTeX Equation Editor — Live MathJax, palette, templates
  An advanced LaTeX equation editor with live MathJax preview, caret-aware palette, templates, history, and one-tap.
• Likelihood Ratio Calculator
  Calculate positive and negative likelihood ratios from TP, FP, TN, and FN.
• Likert Scale Calculator
  Paste per-option survey counts and get n, mean, median, mode, standard deviation, Top-2-Box, Bottom-2-Box, NPS split.
• Limits Explorer — one-sided limits and numeric L'Hôpital
  Check indeterminate forms, sample one-sided limits, apply numeric L'Hôpital 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
  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 Calculator (with steps) – expand & condense
  Expand, condense, and evaluate logarithms with shareable steps.
• Long addition & subtraction (decimal carry/borrow)
  Follow column addition or subtraction with decimals, carries, and borrowing one place at a time.
• Long Division Calculator with Steps
  Enter a dividend and divisor to get long division steps, quotient, remainder, decimal answer, and subtraction work.
• Long Multiplication Calculator with Steps
  Learn whole-number long multiplication by following partial products, shifted rows, and the final addition step.
• Lottery Odds Calculator
  Calculate jackpot odds, 1 in X probability, expected value, prize tiers, and multi-ticket chances for custom.

M

• Mann-Whitney U Test Calculator
  Compare two independent groups with a Mann-Whitney U test. Review exact or asymptotic p-values without assuming.
• 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.
• MCC Calculator
  Calculate Matthews correlation coefficient (MCC), balanced accuracy, precision, recall, specificity, prevalence.
• McNemar Test Calculator
  Enter one paired 2x2 table to read exact and asymptotic McNemar test p-values.
• 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 and z-Score Calculator
  Calculate normal probabilities, z-scores, percentiles, and inverse cutoffs from the mean and standard deviation.
• NPV & PPV Calculator
  Calculate PPV, NPV, sensitivity, specificity, and observed prevalence from TP, FP, TN, and FN, then test how PPV.
• Number Needed to Harm Calculator
  Convert absolute risk increase into number needed to harm and review control risk, exposed risk, and signed risk.
• Number Needed to Screen Calculator
  Convert screening detection yield into number needed to screen and review prevalence, detection rate, and yield.

O

• Odds Probability Converter
  Convert probability to odds or odds back to probability. Useful for Bayes updates, likelihood ratios.
• Odds Ratio Confidence Interval Calculator
  Enter a 2x2 table to read the odds ratio with a 90%, 95%, or 99% confidence interval.
• Odds Ratio from 2x2 Table Calculator
  Enter event and non-event counts for two groups to read each group odds and the odds ratio from one 2x2 table.
• Online Dice Roller (d4-d100, 2d6+3)
  Roll d4 to d100 or use notation like 2d6+3.

P

• P-value & Critical Value Calculator
  Look up p-values from z, t, chi-square, or F statistics, or find critical values from alpha and degrees of freedom.
• 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.
• Permutations & Combinations with Repetition (n^r, nHr)
  Calculate repeated permutations n^r and multichoose values nHr with exact BigInt results or fast.
• Pi Algorithm Race
  Race Gregory, Nilakantha, Machin-like, and Chudnovsky pi algorithms with fixed-time and fixed-digits modes, charts.
• Pi Approximation Explorer
  Compare polygon, Gregory, Nilakantha, and Monte Carlo approximations of pi with charts, errors, examples.
• Pi Digit Lab
  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
  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 for Texas Hold'em
  Calculate Texas Hold'em odds in one place: hand probabilities, outs hit rate, and equity versus random opponents.
• Population Attributable Fraction Calculator
  Estimate population attributable fraction and population attributable percent from exposure prevalence and group risk.
• Population Attributable Risk Calculator
  Estimate population attributable risk from exposure prevalence and attributable risk, or from exposed.
• Population Attributable Risk Percent Calculator
  Estimate population attributable risk percent from exposure prevalence with exposed and unexposed risk, or from direct.
• Post-Test Odds Calculator
  Start from pre-test probability or prior odds, apply a likelihood ratio, and review post-test odds and posterior.
• Power Analysis Calculator
  Plan required sample size, achieved power, or minimum detectable effect for one mean, two means, one proportion.
• Pre-Test Post-Test Probability Calculator
  Convert pre-test probability into post-test probability with LR+ or LR.
• Precision & Recall Calculator
  Calculate precision, recall, F1, specificity, prevalence, and accuracy from TP, FP, TN, and FN.
• 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.
• Print DPI Calculator
  Estimate effective PPI for a print size from image pixels.
• Probability & simulation tools
  Probability simulators and calculators for expected value, trees, combinatorics, distributions, and Monte Carlo.
• 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
  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 & Vertex
  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
  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.
• 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 Tests (chi-square, runs, ACF, JB)
  Run chi-square, runs, autocorrelation, and Jarque-Bera tests on bit or number sequences.
• Ratio Calculator & Proportion Solver with Steps
  Use a ratio calculator and proportion solver with steps.
• Real Estate (Mortgage/Amortization/Affordability)
  Estimate mortgage payments, amortization schedules, and affordability (DTI) together.
• Relative Risk and Odds Ratio Calculator
  Enter event and non-event counts for two groups to compare relative risk, odds ratio, and absolute risk difference.
• Repeating Decimal to Fraction Calculator with Steps
  Convert repeating (recurring) decimals like 0.1666.
• Riemann Sums Calculator
  Visualize left/right, midpoint, trapezoid and Simpson sums for f(x), compare with an adaptive Simpson reference.
• Risk Difference Calculator
  Compare two event-rate groups and review signed risk difference, absolute difference, and each group risk together.
• Risk Difference Confidence Interval Calculator
  Enter one 2x2 table to read the risk difference with a 90%, 95%, or 99% confidence interval.
• Risk Ratio Confidence Interval Calculator
  Enter a 2x2 table to read the risk ratio with a 90%, 95%, or 99% confidence interval.
• Risk Ratio from 2x2 Table Calculator
  Enter event and non-event counts for two groups to read each group risk, the risk ratio, and risk difference.
• ROC AUC Calculator
  Calculate a binary ROC curve, AUC, and threshold table from pasted score,label rows.
• Roman Numeral Converter
  Convert integers to Roman numerals and Roman numerals back to numbers.
• Rounding & error bands
  Round any number, highlight the digit you inspect, and see the error band on a number line.

S

• Sample Size Calculator
  Plan sample size for surveys, means, and balanced A/B tests.
• 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.
• Sensitivity and Specificity Calculator
  Calculate sensitivity, specificity, false positive rate, false negative rate, balanced accuracy, and prevalence.
• 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 shuffle bias: naive swap-everywhere vs Fisher–Yates (and optional sort(() => random - 0.5)).
• Sign Test Calculator
  Run an exact sign test on paired before/after values.
• 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.
• Stars and Bars Calculator
  Use the stars and bars method to count combinations with repetition.
• Statistics (inference & tests)
  Inference tools for confidence intervals, hypothesis tests, regression, and uncertainty.
• Statistics & Probability (overview): Inference
  Overview hub for statistics & probability.
• Stirling Numbers Calculator (1st & 2nd Kind)
  Generate Stirling numbers of the first and second kind, plus Bell numbers, with fast table output, recurrence details.
• Streak Probability Simulator
  Estimate the chance of consecutive wins or losses, expected streak starts, and likely longest streaks in one.
• Study & Classroom Tools: Worksheets, Graph Paper, GPA
  Classroom-ready tools: worksheet generator, graph paper, quick charts, plus GPA and stats calculators.
• Surface & volume nets
  Compute surface area and volume for prisms, pyramids, cylinders, cones, and spheres with net diagrams, face.
• Synthetic Time Series Generator — trend, seasonality
  Generate synthetic time series data with trend, seasonality, noise, missing values, and outliers.

T

• T-Test Calculator
  Run one-sample, two-sample, and paired t-tests from summary statistics or pasted raw data.
• Tax Calculators: VAT, GST, Income Tax, Net ↔ Gross
  Quick tax calculators for VAT/GST, net↔gross conversions, and income tax.
• 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
  Choose a task first, then open the topic hub that narrows calculators and tools for money, study, time, conversion.
• Triangle Solver (SSS / SAS / ASA, Area & Circumradius)
  Select SSS, SAS, or ASA inputs and compute the remaining sides, angles, area, and triangle diagram.
• 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.

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 commit-reveal logs so participants can verify every draw.

W

• Weibull Distribution Generator & Visualizer
  Generate random samples from a Weibull distribution and visualize the PDF and histogram.
• Weighted Random Picker & Randomizer
  Use this weighted random picker and randomizer to draw winners by weight, ratio, or raffle entries.
• Wilcoxon Signed-Rank Test Calculator
  Enter paired before and after values to run a Wilcoxon signed-rank test.
• Word Problem Wizard — percent, ratio, speed
  Solve common word problems by selecting a template, entering values with units, and getting equations and simple.

Y

• Youden’s J Calculator
  Calculate Youden’s J from TP, FP, TN, and FN.