Math calculators
Pick a calculator. Each shows the answer as you type, with the steps underneath.
Fraction calculatorAdd, subtract, multiply and divide two fractions, with the result simplified.Open the calculator ›Simplify fractions calculatorReduce a fraction to lowest terms and see the greatest common factor.Open the calculator ›Mixed number calculatorConvert a mixed number to an improper fraction and back.Open the calculator ›Decimal to fraction calculatorTurn a terminating decimal into a simplified fraction.Open the calculator ›Ratio calculatorFind the missing number in a proportion and simplify a ratio.Open the calculator ›Average calculator (mean, median, mode)Mean, median, mode, range and sum of any list of numbers.Open the calculator ›Standard deviation calculatorSample or population standard deviation, variance and mean of a data set.Open the calculator ›Variance calculatorSample or population variance of a list of numbers.Open the calculator ›Z-score calculatorHow many standard deviations a value is from the mean, and its percentile.Open the calculator ›Probability calculatorProbability of A and B, A or B and neither for independent events.Open the calculator ›GCF calculatorGreatest common factor of two or more numbers, with Euclid's steps.Open the calculator ›LCM calculatorLeast common multiple of two or more numbers.Open the calculator ›Prime factorization calculatorBreak a number into prime factors, and count its divisors.Open the calculator ›Prime number checkerCheck whether any number up to a trillion is prime.Open the calculator ›Square root calculatorSquare root of any number, perfect-square check and simplified radical.Open the calculator ›Exponent calculatorRaise a number to a power, with the exact result for whole numbers.Open the calculator ›Scientific notation calculatorWrite a number in scientific and E notation, or expand it back.Open the calculator ›Factorial calculatorn factorial, exact for any n up to 170.Open the calculator ›Permutation calculatorOrdered arrangements of r items chosen from n.Open the calculator ›Combination calculatorUnordered selections of r items chosen from n.Open the calculator ›Quadratic formula calculatorRoots, discriminant and vertex of ax² + bx + c = 0.Open the calculator ›Percent error calculatorHow far a measured value is from the true value, as a percent.Open the calculator ›Long division calculatorQuotient, remainder and decimal of a division.Open the calculator ›Rounding calculatorRound a number to a decimal place or to the nearest 10, 100 or 1,000.Open the calculator ›Significant figures calculatorCount the significant figures of a number and round to a chosen count.Open the calculator ›Random number generatorDraw random whole numbers in a range, with or without repeats.Open the calculator ›
Math calculators
- Fraction calculator
- Simplify fractions calculator
- Mixed number calculator
- Decimal to fraction calculator
- Ratio calculator
- Average calculator (mean, median, mode)
- Standard deviation calculator
- Variance calculator
- Z-score calculator
- Probability calculator
- GCF calculator
- LCM calculator
- Prime factorization calculator
- Prime number checker
- Square root calculator
- Exponent calculator
- Scientific notation calculator
- Factorial calculator
- Permutation calculator
- Combination calculator
- Quadratic formula calculator
- Percent error calculator
- Long division calculator
- Rounding calculator
- Significant figures calculator
- Random number generator
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
Written by Calculators Free Editorial Team · Data checked 2026-11-12
About · How we verify this · Editorial policy · Corrections
About · How we verify this · Editorial policy · Corrections
General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.