About StatsSolve
StatsSolve is a small set of free statistics calculators built for people who need a correct answer and an explanation of how it was reached — not just a number.
What StatsSolve Is
StatsSolve is a free, ad-supported website that hosts step-by-step statistics calculators alongside plain-language explanations of the math behind them. It started because most calculators online give you a single output and nothing else — no formula, no worked steps, no context for what the number actually means.
The site is built for three kinds of visitors: students working through a probability or stats course who need to check homework and actually understand the steps, teachers and tutors who want a quick reference or a worked example to show a class, and analysts who need a fast, reliable calculation without opening a stats package or rebuilding a spreadsheet formula from scratch.
How the Calculators Are Built
Every calculator on this site is built from the standard formula for its distribution — the same definitions you'd find in a statistics textbook or a reference like NIST's Engineering Statistics Handbook — and each one is checked against known worked examples and, where possible, against results from established statistical software before it goes live.
Each calculator page also shows its work: the formula used, the inputs you entered, and the intermediate steps, not just the final probability or value. That's deliberate. If you can't see how a number was produced, you can't check it, and you shouldn't have to trust it blindly. We'd rather a page be a little longer and actually teach you something than be a black box.
If you ever spot a calculation that looks wrong, tell us — see the contact section below. We fix reported errors as fast as we can and treat them seriously.
The Calculator Library
The library is small right now and growing. These are the calculators live today:
Get in Touch
StatsSolve is run by a small team, not a company with a support department. If you find a bug, want to request a calculator, or just want to say a formula's explanation is confusing, email us directly and a real person on the team will read it.