Math Calculators

Averages, percentages and more — solved fast, with the steps shown.

Stop doing arithmetic under pressure. ziffaro’s math calculators handle averages, percentages, ratios, areas, rates of change and more in seconds — and they show the working, so they are handy for school, homework, work and everyday life. Whether you need the mean, median and mode of a set of numbers, a weighted or semester grade, the surface area of a shape, or the average value of a function, you get the answer instantly with the formula laid out. Every tool runs in your browser, updates live as you type, and is completely free with no signup. They are built to be accurate and clear, so you can check your own work or learn the method rather than just copy a number.