LCM Calculator
Least Common Multiple of two or more whole numbers.
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About this calculator
The LCM is the smallest number divisible by every input. Classic uses: syncing repeating events (buses every 12 and 15 min meet every LCM=60 min), adding fractions, and scheduling cron jobs.
Formula
LCM(a,b) = a×b ÷ GCD(a,b), extended pairwise across all inputs.
Frequently Asked Questions
Why can't I enter decimals?
LCM is defined over integers. For fractional cycles convert units first (e.g. 1.5 hours → 90 minutes).
Does order matter?
No — LCM is commutative and associative across the full list.