Math

Work out what X% of a number is, and what percentage one number is of another.

Add, subtract, multiply or divide two fractions (or mixed numbers) — simplified, as a mixed number, and as a decimal.

Simplify a ratio, solve a proportion, scale a ratio, split an amount by ratio, or convert a ratio to a fraction and percentage.

Find the square root of any number — plus nth root, cube root, decimal precision control, and simplified radical form (e.g. √72 = 6√2).

Raise any number to a power — including negative and fractional exponents, with step-by-step expansion for integer powers and clean handling of 0⁰, division-by-zero, and complex-root edge cases.

Solve any quadratic equation ax² + bx + c = 0 — discriminant, real or complex roots, vertex, axis of symmetry, canonical and factored form, plus an interactive parabola graph.

Work out the price after a discount, the discount percentage between two prices, the original price before a sale, and the true total when discounts stack.

Calculate the standard deviation, variance, and mean of your data set for a sample or a population, with a clear step-by-step breakdown.

Calculate the mean, median, mode, and range of any data set — plus an optional weighted average — with a frequency chart and sorted-values table.

Add or remove VAT from a price, work out the net and gross amount, and see the tax broken out at any rate.

Find the GCD (greatest common divisor, also called GCF or HCF) and LCM (least common multiple) of two or more numbers, with the Euclidean algorithm steps shown.

Round any number to decimal places, the nearest ten/hundred/thousand, or significant figures — with half-up, banker's, ceiling, floor, or truncate rounding.

Calculate speed, distance or time and convert between km/h, mph, m/s and knots.