MATH CALCULATORS
Least Common Multiple Calculator
Calculate the least common multiple (LCM) of two or more positive integers.
Try the tool
Runs in your browserFormula or method
LCM(a, b) = |a × b| / GCF(a, b).
Use the method above to understand how the result is produced. Some tools use text-processing rules rather than mathematical equations.
How to use the Least Common Multiple Calculator
Enter two or more positive whole numbers and calculate the smallest positive multiple shared by all of them.
- Enter the requested values or paste your content into the fields above.
- Choose the appropriate action to calculate, format or preview.
- Review the result and copy or save it when needed.
Worked example
The LCM of 6 and 8 is 24.
Use the example as a reference, and replace the sample inputs with your own values.
Frequently asked questions
How is LCM different from GCF?
GCF is the largest shared divisor; LCM is the smallest shared positive multiple.
Can I use three numbers?
Yes. The tool finds the LCM across your entire list.
Can LCM equal one of the numbers?
Yes, if every other number divides that number.
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