About Standard Deviation Solver

Standard Deviation Solver is a small independent website that does one job: solving standard deviation and the statistics around it. Free, fast statistics with steps, no signup.

The site is built and maintained by an independent developer. There is no company behind it and no team page full of stock photos. It exists because working out a standard deviation should take seconds, not a login screen, a spreadsheet download, or a calculator app with ads.

Everything runs in your browser with plain JavaScript. Nothing you type is sent to a server, there are no accounts, and the tool is free with no ads or signup. Open the page, paste your numbers, and get on with your day. Alongside the main solver you will find a variance calculator, a mean median mode calculator, and guides that explain the math in plain English.

If you spot a wrong result or have an idea that would make the tool more useful, the contact page has an email address that reaches a real person.