Math & Statistics Calculators
7 free calculators · runs in your browser · nothing you type is stored
From a full scientific calculator to single-purpose solvers, these tools show their working rather than just the answer: the prime factors behind a GCD, the discriminant behind a quadratic's roots, the formula behind a standard deviation. That makes them useful for checking homework as well as for getting a number.
Fractions and number-theory results are computed exactly, not as rounded decimals, and statistics tools say whether they are using the population or the sample formula.
All Math & Statistics calculators
Scientific CalculatorTrigonometry, logarithms, powers and roots in one expression.Fraction CalculatorAdd, subtract, multiply and divide fractions — exactly.GCD & LCM CalculatorGCD (HCF) and LCM of two or more whole numbers, with the prime factors shown.Quadratic Equation SolverSolve ax² + bx + c = 0: discriminant, real or complex roots, with every step shown.Permutation & Combination CalculatorWork out nPr and nCr exactly, with the formula and the working shown.Standard Deviation & Variance CalculatorPopulation and sample standard deviation and variance, plus mean, median and range.Ratio & Proportion CalculatorSimplify a ratio to lowest terms or solve A : B = C : x, with the steps shown.
Which calculator do I need?
Start from the job you are trying to do.
- Evaluate a whole expression with trig, logs and powersScientific
- Add, subtract, multiply or divide fractionsFraction
- Find the GCD (HCF) and LCM of numbersGCD & LCM
- Solve ax² + bx + c = 0Quadratic Equation
- Count arrangements and selections (nPr, nCr)Permutation & Combination
- Simplify a ratio or solve A : B = C : xRatio & Proportion
- Get standard deviation and variance for a data setStandard Deviation & Variance