Math calculators
Solve homework and everyday math and see how the answer is reached: each calculator shows the formula or the steps, not just the result. Everything runs in your browser.
9 calculators
Which calculator do you need?
- Do a quick sum: add, subtract, multiply or divideCalculator
- Find 15% of a number, or what percent one number is of anotherPercentage
- Add 1/2 + 1/3, multiply or simplify fractionsFractions
- If 3 cost $7.50, how much do 8 cost? Solve for xProportion
- Simplify a ratio (12:18 → 2:3) or split something into partsRatio
- Find the common denominator of several fractionsLCM
- Reduce a fraction or split items into equal groupsGCF
- Check whether a number is prime or break it into prime factorsPrime numbers
- Find the square footage of a room or any shapeArea
Arithmetic and fractions
Everyday sums and fractions, with the answer in simplest form, as a mixed number and as a decimal.
Ratios and proportions
When two quantities are related: solve for the missing value, find equivalent ratios and split a total in a given ratio.
Factors, multiples and primes
The Euclidean algorithm, prime factorization and exact primality checks, even for large numbers. The GCF simplifies fractions; the LCM gives their common denominator.
Geometry
The area of eight plane shapes with the formula worked out and the result in other square units.
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