Find the least common multiple (LCM) of two or more numbers.
The method behind this calculator
Enter numbers to get their least common multiple, alongside the greatest common factor. The LCM is the smallest number they all divide into.
How to use it
- Enter your figures in the fields provided.
- The result updates as you type.
- Review the breakdown below the main number.
The calculation
LCM(a, b) = a × b ÷ GCF(a, b)
Worked example
The calculator opens with a numbers of 12, 18, 24. On those figures the GCF is 6. Alongside it, LCM comes out at 72. Change any field and every figure updates as you type.
Questions people ask about this
What is the LCM?
The smallest positive number that every input divides into evenly.
Where is the LCM used?
Adding fractions with different denominators and scheduling repeating events.