Math & Calculators
Scientific calculator, statistics, fractions, matrices, primes, ratios and exact big-number arithmetic.
Scientific Calculator
Type a whole expression and watch it resolve as you go — powers, roots, logs, trigonometry and factorials.
Statistics Calculator
Paste a column of numbers and get mean, median, mode, standard deviation, quartiles and outliers at once.
Fraction Calculator
Add, subtract, multiply and divide fractions and mixed numbers exactly, with the working shown.
GCD & LCM Calculator
Find the greatest common divisor and lowest common multiple of any set of whole numbers, with the steps.
Prime Factorization Calculator
Break any whole number into its prime factors, exactly, even well beyond the usual size limits.
Permutation & Combination Calculator
Work out nCr and nPr, with and without repetition, and see all four answers side by side.
Quadratic Equation Solver
Solve ax² + bx + c = 0 with roots, discriminant, vertex, factored form and a graph of the parabola.
Matrix Calculator
Add, multiply, transpose and invert matrices with exact fractions — determinant, rank, trace and RREF too.
Big Number Calculator
Exact arithmetic on whole numbers of any length — far past the point where ordinary calculators start rounding.
Scientific Notation Converter
Convert between plain decimals, scientific notation, E notation and engineering notation, keeping every digit.
Ratio Calculator
Simplify ratios, solve A:B = C:D for a missing value, and split a total in any ratio.
About Math & Calculators
Calculators that give you the exact answer and show how they reached it. The scientific calculator takes a whole expression rather than one keypress at a time, and resolves it as you type. The statistics calculator reports the sample and population forms of variance side by side instead of quietly picking one, and marks outliers by the same rule a box plot uses. Fractions, matrices and prime factorisations are all computed in whole numbers or exact ratios rather than decimals — which is why a determinant of zero here really is zero, a third plus a third plus a third is exactly 1, and a number past nine quadrillion factors correctly instead of rounding into nonsense. Alongside those sit a quadratic solver that draws the parabola, a combinations and permutations calculator that shows all four counting rules at once, a ratio calculator, a scientific notation converter, and a big number calculator with no size limit at all. Everything runs in your browser.
Everything on this page runs directly in your browser — none of your input is uploaded, and every tool keeps working when you are offline.