Math · Arithmetic & Number Theory
Arithmetic & Number Theory calculators
Percentages, fractions, exponents, factors, primes, bases and rounding.
Basic CalculatorA simple online calculator with buttons — add, subtract, multiply and divide.Average CalculatorMean, sum and count of a list of numbers.Percentage CalculatorFind a percent of a number, a ratio as a percent, or a percentage change.Percent Error CalculatorCompare a measured value against the true value as a percent error.Fraction CalculatorAdd, subtract, multiply or divide two fractions and reduce the result.Exponent CalculatorRaise a base to a power, including negative and fractional exponents.Logarithm CalculatorLog of a number in any base, plus natural log and log base 10.Root CalculatorSquare root, cube root or any nth root of a number.Rounding CalculatorRound a number to a chosen number of decimal places or nearest unit.Scientific Notation CalculatorConvert a number to and from scientific (standard form) notation.Prime Factorization CalculatorBreak a number into its prime factors.GCF CalculatorGreatest common factor (HCF) of two or more numbers.LCM CalculatorLeast common multiple of two or more numbers.Factor CalculatorList all factors (divisors) of a number.Common Factor CalculatorFind every factor shared by two numbers.Big Number CalculatorExact arithmetic on very large integers, beyond normal precision.Long Division CalculatorDivide and get the quotient, remainder and decimal result.Binary CalculatorAdd, subtract or multiply binary numbers, or convert to decimal.Hex CalculatorHexadecimal arithmetic and conversion to and from decimal.Random Number GeneratorGenerate random integers in a range; change the seed to reroll.Ratio CalculatorSimplify a ratio and solve proportions (A:B = C:?).Half-Life CalculatorRemaining quantity after decay, given a half-life and elapsed time.