LCM Calculator

An lcm calculator to help with finding the least common multiple between numbers.

Find the least common multiple (LCM) of two numbers with this least common multiple calculator.


First Number:
Second Number:

Calculate the greatest common factor between two numbers.

What is the Least Common Multiple?

The least common multiple between two numbers is the smallest integer that is divisible by both numbers. Sometimes the least common multiple is referred to as the lowest common multiple or the least common denominator

For example, find the LCM of the two numbers 12 and 16:

The multiples for 12 are 12, 24, 36, 48, 60, 72, 84, 96, etc.

The multiples for 16 are 16, 32, 48, 64, 80, etc.

The two numbers (12 and 16) share many common multiples if you keep expanding on the lists of multiples. But from comparing the two lists, we can see that 48 is the lowest, or least common muliple.

Least Common Multiple Equation

LCM = (a*b) / GCF(a and b)
Use this GCF Calculator to help with this formula

More Resources...

Least Common Multiple Video
Least Common Multiple Games
Least Common Multiple Tutorial