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LCM Calculator

Enter at least 2 positive integers

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What is LCM?

The Least Common Multiple (LCM) is the smallest positive integer that is divisible by two or more numbers without leaving a remainder. It's commonly used in arithmetic operations with fractions, finding common denominators, and solving various mathematical problems.

This calculator finds the LCM of multiple numbers using the relationship between LCM and GCF: LCM(a, b) = (a × b) / GCF(a, b).

LCM Formula

LCM(a, b) = (a × b) / GCF(a, b)

For multiple numbers, find LCM pairwise until all numbers are included.

Example

Find LCM of 12, 18, and 24:

  • • LCM(12, 18) = (12 × 18) / 6 = 36
  • • LCM(36, 24) = (36 × 24) / 12 = 72
  • Answer: 72
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