About MathInSite
MathInSite is a free collection of interactive math calculators built around one idea: a calculator should teach, not just hand you an answer. Every tool shows the full step-by-step working, so you can check your homework and actually understand how the result was reached.
Our Mission
Most online calculators give you a number and stop there. That is fine when you already understand the method — but it does nothing for a student trying to learn it. MathInSite was built to close that gap. Each of our 27 calculators walks through the solution the way a good teacher would: the formula, the substitution, each step of the arithmetic, and a short explanation of why each step happens.
We cover the math that high school and college students meet most often — algebra, geometry, trigonometry, statistics, pre-calculus, and introductory calculus — and we keep adding depth to each tool over time.
Why MathInSite Is Free
Learning math should not sit behind a paywall. Every calculator on this site is free to use, with no account, no sign-up, and no "unlock the steps" upsell. The step-by-step solutions that other sites charge for are visible to everyone, on every page, every time.
We keep the site lightweight and fast, it works on phones and laptops alike, and we use only privacy-friendly analytics to understand which tools students rely on most. You can read exactly what we collect in our Privacy Policy.
How Our Calculators Work
Every calculator is built on the standard mathematical formulas taught in school and college curricula — the same definitions you will find in your textbook. When you enter your values, the calculator applies the relevant rule, shows each step of the work, and (where it helps) draws a diagram or graph so you can see the result, not just read it.
The worked examples in each calculator's guide are checked for accuracy, and the educational sections are written to match how the topic is actually taught — so what you learn here lines up with what your class expects.
Our Commitment to Accuracy
Math has right answers, and we take getting them right seriously. Our formulas follow standard mathematical conventions, and we test our calculators against worked examples and edge cases. That said, no tool is perfect — if you ever spot a result that looks wrong, please tell us. We read every report and fix confirmed errors quickly.
Who's Behind MathInSite
MathInSite is built and maintained by a small, independent team that loves math and wants to make it less intimidating. We are not a big publisher — just people who think clear, free, step-by-step tools can help students far more than a bare answer ever could.
Get in Touch
Found a bug, have a calculator you'd like us to build, or just want to say hello? Email us at contact@mathinsite.com. Feedback from students and teachers shapes what we build next.