Maths & numbers calculators
Fractions, averages, geometry and a fair coin when you need one.
5 tools · always free
Coin flipHeads or tails, instantly — flip one coin or a hundred.
Random number generatorPick numbers in any range, with or without repeats.
Fraction calculatorAdd, subtract, multiply and simplify fractions.
Average calculatorMean, median, mode, range and standard deviation.
Geometry calculatorArea, perimeter and volume for everyday shapes.
Which one do you need?
- Coin flip
- Heads or tails, instantly — flip one coin or a hundred.
- Random number generator
- Pick numbers in any range, with or without repeats.
- Fraction calculator
- Add, subtract, multiply and simplify fractions.
- Average calculator
- Mean, median, mode, range and standard deviation.
- Geometry calculator
- Area, perimeter and volume for everyday shapes.
Other categories
Percentages & shopping 8Loans & mortgages 5Saving & investing 4Income & budget 3Converters 11Dates & time 4
Or browse all 40 calculators.