Math Tools
Free math calculators: work out percentages, averages, fractions, ratios and greatest common divisors, generate random numbers and check for primes — instantly.
6 math tools
Percentages, fractions, ratios and more.
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Percentage Calculator
Work out percentages, increases and changes.
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Average Calculator
Find the mean, median, mode and range.
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Fraction Calculator
Add, subtract, multiply and divide fractions.
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Ratio Calculator
Simplify ratios and solve proportions.
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Trending
Random Number Generator
Generate random numbers in any range.
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Prime Number Checker
Check if a number is prime and factor it.
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Frequently asked questions
Yes. Every tool is completely free, with no sign-up and no usage limits.
Tools run in your browser wherever possible, so your data stays on your device.
No installation is required — everything works instantly in your web browser.
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