LCM Calculator — Least Common Multiple
Find the least common multiple of two numbers
How to Use LCM Calculator
Find the least common multiple of two numbers No signup, and nothing gets uploaded for most use.
- 1
Enter your numbers in the input fields.
- 2
Choose the calculation options or frequency.
- 3
The result updates instantly as you type.
- 4
Review the breakdown, chart, or schedule, and copy the answer.
Why you might like it
- Nothing to upload — the work happens on your device.
- Free with no signup, no watermarks, and no daily limits.
- Works in any modern browser on any device — nothing to install.
- Usually done in a few seconds, so it doesn't get in your way.
Frequently Asked Questions
What is the least common multiple?▾
The LCM of two numbers is the smallest positive number that is a multiple of both. For 4 and 6, the common multiples are 12, 24, 36, … so the LCM is 12.
How is LCM related to GCD?▾
For any two integers, a × b = LCM(a, b) × GCD(a, b). So once you know one, you can find the other: LCM = a × b ÷ GCD.
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