Math Calculators

The maths you need for homework or on the job: area and volume, ratios, exponents, logarithms, quadratic roots, LCM and GCF, and probability.

Ratio CalculatorEnter three values to find the fourth — the unknown in the proportion.
Area CalculatorChoose a shape and enter its dimensions to get the area and perimeter.
Volume CalculatorChoose a solid and enter its dimensions to get the volume, surface area and litres.
Distance Formula CalculatorEnter the coordinates of two points to get the distance, midpoint and slope.
Exponent CalculatorEnter a base and an exponent to get the power, its root and scientific notation.
Log CalculatorEnter a number and choose a base to get its logarithm.
Quadratic Formula CalculatorEnter the coefficients a, b and c to get the roots and the discriminant.
LCM and GCF CalculatorEnter your numbers to get their greatest common factor, least common multiple and prime factors.
Probability CalculatorEnter the probability of two events to see the chance of both, either or neither.