Math Calculators
Everyday math helpers for percentages, ratios and quick calculations you can trust.
Percentage Calculator
Solve the three most common percentage problems: a percent of a number, what percent one value is of another, and the percentage change between two numbers.
Open calculatorFraction Calculator
Add, subtract, multiply or divide two fractions. The result is reduced to lowest terms and also shown as a mixed number and a decimal.
Open calculatorAverage Calculator (Mean, Median, Mode)
Enter a list of numbers to find the mean (average), median, mode and range, along with the sum and count. Separate values with commas or spaces.
Open calculatorRatio Calculator
Simplify a ratio to its lowest terms, or solve a proportion a : b = c : d for the missing value. Results include the decimal value and each part's share of the whole.
Open calculatorStandard Deviation Calculator
Enter a list of numbers to find the sample and population standard deviation, along with the variance, mean, count and sum. Separate values with commas or spaces.
Open calculator