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Number & Math

Free math tools — binary/hex/decimal converter, percentage calculator, random number generator, Roman numeral converter, prime checker, statistics calculator and more.

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Number Base Converter

Convert between binary, decimal, hex and octal

Percentage Calculator

Calculate percentage increase, decrease and more

Random Number Generator

Generate random numbers in any range

Roman Numeral Converter

Convert between decimal and Roman numerals

Fibonacci Generator

Generate Fibonacci sequences and check numbers

Prime Number Checker

Check primes and find prime factorizations

GCD & LCM Calculator

Find GCD and LCM of multiple numbers

Statistics Calculator

Calculate mean, median, mode, std deviation, and more

Binary Calculator

Add, subtract, multiply, and divide binary numbers

Scientific Notation Converter

Convert between decimal and scientific notation

Fraction Calculator

Calculate and simplify fractions

BMI Calculator

Calculate Body Mass Index from height and weight