Math Calculators
Solve everyday math in seconds. Our free math calculators handle percentages, ratios, averages and more — with clear results you can trust.
About Math Calculators
Math calculators here cover the arithmetic that turns up in real situations rather than textbooks: working out a percentage on a receipt, averaging a set of readings, checking a ratio before you scale a recipe or a mix, or converting a stack of grades into something meaningful. Students, teachers, tradespeople and anyone doing quick sums at a desk all end up needing the same handful of tools. The percentage calculator is by far the most used, because percentages come up in more places than any other single operation. The average calculator handles lists of numbers without spreadsheet setup, and the standard deviation calculator tells you how spread out those numbers actually are.
The right tool usually follows straight from the shape of your question. If you are comparing a before and after figure, the percentage change calculator is the one you want rather than the plain percentage calculator, since it handles the direction and the base correctly. For schoolwork, the GPA calculator aggregates a whole term while the grade and final grade calculators answer the narrower question of what you need to score next. When you are dealing with parts of a whole rather than decimals, the fraction calculator keeps everything exact instead of introducing rounding. For anything algebraic or scientific, the quadratic equation solver, exponent, root and prime number tools handle specific forms, and the scientific calculator covers general work when you just need a proper keypad.
What all of these share is that they run entirely in your browser. Nothing you type is uploaded, there is no sign-up, no install and no cost, and you can use them as often as you like. The honest limit is that a calculator does the arithmetic, not the thinking: it will faithfully compute whatever you give it, so a misplaced decimal, the wrong base figure or a misread question produces a confidently wrong answer. It is also worth remembering that results involving decimals are rounded for display, so very long chains of calculations can drift slightly. Check that the inputs match the question you meant to ask before you trust the output.
Frequently asked questions
Are these math calculators free?
Yes, all of them. There is no sign-up, no account and no usage limit.
Is anything I type sent to your server?
No. These calculators run entirely in your browser, so your numbers stay on your device and are not stored by us.
Can I use these for homework or exams?
They are fine for checking your own work and understanding a method, but whether you may use a calculator in an assessment is entirely up to your school or exam board. Check their rules first.
Why does my result differ slightly from another calculator?
Almost always rounding. Results are rounded for display, and different tools round at different stages, so long calculations can drift by a small amount in the final decimal places.