#21 FREE TOOLS
Math & numbers calculators
Basic math, fractions, percentages and number theory. All calculations happen locally in your browser.
Browse 21 calculators
Scientific CalculatorEvaluate scientific expressions, exponents, trigonometry, logarithms and more.↗
Fraction CalculatorAdd, subtract, multiply, divide and simplify fractions exactly.↗
Prime Number CheckerDetermine whether an integer is prime and list its small factors.↗
Random Number GeneratorGenerate random integers in a chosen interval.↗
Percentage CalculatorFind a percentage of any number.↗
Percentage Change CalculatorCompare an old and a new value with percentage change.↗
Percentage Difference CalculatorCompare two values relative to their average.↗
Ratio CalculatorCalculate a ratio and the share represented by each part.↗
Proportion CalculatorSolve a/b = c/x for an unknown fourth value.↗
Weighted Average CalculatorFind an average using weights for three numbers.↗
Nth Root CalculatorFind the nth root of a nonnegative value.↗
Power & Exponent CalculatorRaise a base to any power.↗
Logarithm CalculatorCalculate a logarithm with an arbitrary base.↗
Factorial CalculatorCalculate factorial of a nonnegative integer.↗
Permutation CalculatorCount ordered arrangements of r objects chosen from n.↗
Combination CalculatorCount ways to choose r items from n without ordering.↗
GCD CalculatorFind the greatest common divisor of two integers.↗
LCM CalculatorFind the lowest common multiple of two integers.↗
Modulo CalculatorFind the Euclidean remainder after division.↗
Arithmetic Mean CalculatorCalculate the mean of four values.↗
Geometric Mean CalculatorCalculate the geometric mean of positive numbers.↗