Free Calculators
Everyday math and number calculators. Each one shows its formula and worked examples so you can check the result, not just trust it.
Average Calculator
Enter your numbers in the fields — add as many as you need, or paste a whole list — to get the mean (average), median, mode, range, sum, and count at once.
Percentage Calculator
Work out percentages three ways: a percent of a number, what percent one value is of another, and the percentage change between two numbers.