About Statistics Calculator

Statistics Calculator is a free suite of statistics calculators and reference tables built for students, researchers, and anyone who works with data. Every tool gives you an instant, accurate answer alongside the formula and the full step-by-step working — so you can check your understanding, not just copy a number.

Our approach

Calculations run in your browser and are powered by a single, open, unit-tested statistics library. We test each function against known reference values so the results you see match what you would get by hand or in Excel, R, or Python.

Free, forever

There are no accounts, no paywalls, and no upsells. If a calculator has helped you, the best thanks is to share it.