Last updated: March 2, 2026 by Dr. David Park

How to Find the Least Common Multiple

Formula

The LCM is the smallest positive integer that is divisible by both numbers. It is computed as |a x b| / GCF(a,b).

LCM is essential when adding fractions with different denominators.

Common use cases:

  • Adding fractions with unlike denominators
  • Scheduling recurring events
  • Finding common periods in oscillations

Frequently Asked Questions

DD

Dr. David Park

Applied Mathematician, PhD Mathematics

David holds a PhD in Applied Mathematics from MIT. He has published research on numerical methods and computational algorithms used in engineering and scientific calculators.

Share & Embed

Was this calculator helpful?

Related Calculators