โ Math
LCM Calculator
The least common multiple is the smallest number that all the values divide into. It is what you need to find a common denominator when adding fractions with different denominators.
How it works
First number
Second number
Third number (optional)
Least common multiple
Greatest common divisor
LCM ร GCD
Frequently asked questions
How do I use the LCM Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.