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Math Calculators

LCM Calculator

Find the least common multiple of two or more whole numbers.

Free browser toolRuns in your browserNo sign-up

Separate two or more numbers with commas or spaces.

Least common multiple

180

About the LCM Calculator

The least common multiple is the smallest non-negative number that is a multiple of every number in a set. For 12 and 18, the LCM is 36.

LCM is useful for finding common denominators, synchronizing repeating schedules and solving problems where cycles must meet at the same point.

Enter two or more whole numbers at once. The calculator uses the relationship between LCM and GCF to calculate the result efficiently.

Key features

  • Two or more whole numbers
  • Comma or space-separated input
  • Safe-integer overflow protection
  • Instant local calculation

How to use

  1. 1Enter at least two whole numbers.
  2. 2Separate the values with commas or spaces.
  3. 3Read the least common multiple.

Examples

LCM of two numbers
Input: 4 and 6
Output: 12

12 is the smallest number that both 4 and 6 divide into.

Frequently asked questions

What is the LCM of 12 and 18?
The LCM is 36, the smallest positive number divisible by both 12 and 18.
How is LCM related to GCF?
For two non-zero integers, their LCM multiplied by their GCF equals the absolute product of the two numbers.
What happens if one number is zero?
The least common multiple of a set containing zero is zero.

Continue your workflow

Open a related tool to prepare your files or refine the finished result.