LCM Calculator
Least common multiple.
Enter the values and press Calculate.
How to use LCM Calculator
The least common multiple is the smallest positive integer that both numbers divide. This tool computes it from the GCD.
Open LCM Calculator on toolpermarket. It runs entirely in your browser, so you can start without creating an account.
Enter the two positive integers a and b in the fields above, then press Calculate.
Read the result below the form. Change any input and run it again as many times as you like — the math is instant and local.
Worked example. The LCM of 4 and 6 is 12.
When to use LCM Calculator. Use it to add fractions with different denominators or to sync repeating cycles.
Frequently asked questions
Is LCM Calculator free to use?
Yes. LCM Calculator runs entirely in your browser. There is no account, no upload, and no cost.
Does LCM Calculator work on mobile?
Yes. The layout is responsive, so LCM Calculator works on any phone, tablet, or desktop with a modern browser.
How is LCM linked to GCD?
LCM times GCD equals the product of the two numbers, so the tool reuses the GCD.
Can inputs be zero?
No. Zero has no least common multiple, so the tool requires positive integers.