Math Calculators

The everyday math you actually need: percentages, averages, and fraction conversions.

Calculate percentages three ways: what is X% of Y, what percent X is of Y, and the percentage change between two numbers.

Calculate the mean, median, sum, and count of any list of numbers. Paste or type values separated by commas, spaces, or new lines.

Calculate the standard deviation and variance of a data set, both sample and population versions, along with the mean.

Solve the missing value in a proportion (A:B = C:D) and simplify any ratio to its lowest terms. Useful for scaling recipes, maps, and mixtures.

Convert any fraction to a decimal and percentage, and see the fraction in lowest terms. Works with improper fractions too.