Math Calculators

Percentages, averages and other quick math.

Quick math calculators for the problems that come up in school, work and daily life. Find percentages and percent changes, the mean and median of a list of numbers, fractions, ratios, and random numbers for games and draws.

Every calculator shows the formula and a worked example so you can learn the method as well as get the answer.

Which calculator do I need?

• Finding a percentage or percent change: Percentage Calculator
• Finding the mean or median: Average Calculator
• Adding or dividing fractions: Fraction Calculator
• Simplifying or scaling a ratio: Ratio Calculator
• Picking random numbers: Random Number Generator

All math calculators

• Percentage CalculatorFind a percent of a number, what percent one number is of another, or a percent change.
• Average CalculatorMean, median, minimum, maximum and sum of a list of numbers.
• Fraction CalculatorAdd, subtract, multiply and divide fractions with simplified results.
• Ratio CalculatorSimplify a ratio and scale it up or down.
• Random Number GeneratorGenerate random whole numbers in any range, with or without repeats.
• Standard Deviation CalculatorStandard deviation and variance for a list of numbers, sample and population.