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LCM Calculator

Find the least common multiple of two or more whole numbers, with the full prime-factor breakdown.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

LCM(a, b) = |a · b| / GCD(a, b). For more than two numbers, reduce pairwise.

In depth

Find the least common multiple of two or more whole numbers, with the full prime-factor breakdown.