Mathematics

Area and perimeter of any 2D shape

Simplify an aspect ratio and resize without distortion

A fast, free online calculator

Binary, hex and bitwise arithmetic

Area, circumference, radius, sector & arc

nCr, nPr and factorials for counting

Arithmetic, polar form, powers and roots

Differentiate any function, exactly

Raise any number to any power

Factor polynomials and find their roots

Add, subtract, multiply and divide fractions

Greatest common divisor and least common multiple

Antiderivatives and definite integrals

Evaluate limits, one-sided or at infinity

Solve 2×2 and 3×3 systems with working

log, ln, log₂ and any custom base

Long division with full worked steps

Determinant, inverse, eigenvalues and more

Mean, median, mode, spread, quartiles & outliers

Mod, GCD, modular inverse and power

Square root, cube root, any nth root + surds

Write any number in words

How far a measurement is from the true value, as a percentage

Add, multiply, divide and evaluate polynomials

Is it prime? Plus full factorisation

Solve a : b = c : x for the missing value

Find a missing side of a right triangle

Simplify any ratio to its lowest terms

Round to places, sig figs, or nearest 5/10/100

Trig, logs, powers, roots and more

Nth term and sum of an arithmetic or geometric sequence

Solve any triangle from 3 measurements

sin, cos, tan, their reciprocals and inverses

Dot, cross, magnitude, angle and projection

Volume and surface area of any solid