About StatHow
Statistics calculators that show their work, so you can learn the method, not just copy the answer.
Why StatHow exists
Most online statistics calculators give you a number and stop there. That's fine if you only need the answer, but it doesn't help when you need to check your homework, explain a result to your manager or understand why a p-value came out the way it did.
StatHow is built around a simple idea: a calculator should work like a good worked solution on paper. You see the formula, the numbers going in, every intermediate step and the final answer, followed by a short explanation of what that answer means.
What every tool includes
- Step-by-step working. The full calculation, written out the way you'd write it by hand.
- A plain-English interpretation. What the result says about your data, without jargon.
- Downloadable charts. Clean, labeled charts you can save for reports, assignments and slides.
- The formula explained. Each symbol defined, plus a worked example with real numbers.
Who it's for
StatHow is written for students taking an intro or intermediate statistics course, researchers who need a quick check, and analysts who want a clear way to show their reasoning. The examples and conventions follow what's typically taught in US high school and college statistics courses.
Your data stays in your browser
Every calculation runs on your own device. The numbers you type into a StatHow tool are not sent to or stored on our servers. See the privacy policy for details.
Free to use
StatHow is free and doesn't require an account. The site is supported by advertising, which keeps the tools free for everyone.
Found a mistake?
Accuracy matters more than anything else here. If a result looks wrong or an explanation is unclear, please get in touch with the tool name and the numbers you entered, and it will be checked and fixed.