Free Math
Serious math, in your browser: graphing calculator, matrix operations, systems of equations, numeric derivatives and integrals, triangle and geometry solvers, permutation/combination, probability, z-scores, confidence intervals, prime factorization, polynomial factoring, truth tables, and more — 33 tools from arithmetic to linear algebra.
Graphing Calculator
Plot up to 3 functions with pan and zoom.
Open tool → LiveMatrix Calculator
Add, multiply, invert matrices up to 4×4.
Open tool → LiveSystem of Equations Solver
Solve 2×2 and 3×3 systems step by step.
Open tool → LiveDerivative & Integral Calculator
Numeric derivatives and Simpson’s-rule integrals.
Open tool → LiveTriangle Solver
SSS, SAS, ASA, AAS with a labeled diagram.
Open tool → LivePythagorean Calculator
Solve any side of a right triangle.
Open tool → LiveCircle Calculator
Radius, diameter, circumference, area from any one.
Open tool → LiveArea & Volume Calculator
Areas and surface/volume for common shapes.
Open tool → LiveSlope Calculator
Slope and line equation from two points, graphed.
Open tool → LiveDistance Calculator
2D/3D distance and midpoint between points.
Open tool → LiveBitwise Calculator
AND, OR, XOR, NOT, shifts in binary and hex.
Open tool → LiveHalf-Life Calculator
Decay math plus a labeled decay chart.
Open tool → LiveLCM & GCF Calculator
LCM and GCF for up to 6 numbers, with steps.
Open tool → LivePrime Factorization
Factor any integer up to 10¹², step by step.
Open tool → LivePermutation & Combination
nPr and nCr, with or without repetition.
Open tool → LiveProbability Calculator
Single, AND, OR, and complement probabilities.
Open tool → LiveZ-Score Calculator
Z-scores, percentiles, and critical values.
Open tool → LiveConfidence Interval Calculator
Confidence intervals with margin of error.
Open tool → LiveP-Value Calculator
P-values from z/t statistics, plainly explained.
Open tool → LiveSample Size Calculator
Required sample size for surveys and studies.
Open tool → LiveRatio Simplifier
Simplify, scale, and split ratios.
Open tool → LivePercent Error Calculator
Percent error and percent difference.
Open tool → LiveNumber Sequence Solver
Detect patterns and predict the next terms.
Open tool → LiveScientific Notation Converter
Convert and calculate in scientific notation.
Open tool → LiveBig Number Calculator
Exact arithmetic on numbers of any size.
Open tool → LiveComplex Number Calculator
Add, multiply, divide a+bi — with steps shown.
Open tool → LiveRoman Numeral Converter
1–3999 both ways, with additive breakdowns.
Open tool → LiveNumber to Words
Any number up to 999 trillion in English words.
Open tool → LiveLong Division with Steps
The full tableau: quotient, remainder, decimals.
Open tool → LivePolynomial Factor / Expand
Factor over integers with steps, or expand products.
Open tool → LiveNumeric Limit Calculator
Estimate limits numerically, spot infinity and DNE.
Open tool → LiveTruth Table Generator
Full 2ⁿ truth tables for any logic expression.
Open tool → LivePrimality Tester
Deterministic prime test with smallest-factor finder.
Open tool →Related categories
More from the codex
Browse all categories
Every category on the codex, from study tools to ciphers — pick your starting point.
Browse → LivePrompt Simulator
Practice prompt engineering: write prompts, get scored 0–10.
Open tool → LiveGPA Calculator
Semester and cumulative GPA with weighted scales and a target planner.
Open tool →About these math
Every tool below is free, works in your browser, and needs no account.
- Can the graphing calculator handle my homework?
- It plots 2D functions Desmos-style, with zoom and trace. For calculus homework, pair it with the numeric derivative/integral and limit calculators.
- How do I show my work?
- The long-division tool shows every step, and the polynomial tool factors with the rational-root theorem laid out — built for showing work, not just answers.
- Is there a statistics section?
- Yes — z-scores, confidence intervals, p-values, and sample-size estimation live here alongside the general statistics calculator.
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