LCM & GCD Calculator

Least Common Multiple is the smallest positive integer that is divisible by all given numbers.

Greatest Common Divisor (or HCF) is the largest positive integer that divides each of the numbers.

You can calculate the LCM/GCD of up to 10 numbers simultaneously using this tool.

LCM and GCD are usually defined for positive integers. If you enter negative numbers, their absolute values are used.