LCM of 3 and 5

The least common multiple of 3 and 5 is 15.

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How to use this tool

Enter first number and second number in the fields above.
Results update instantly as you type — or click Calculate.
Read your lcm and the full breakdown beneath it.

The LCM of 3 and 5 is 15, since 3 and 5 share no common factors other than 1.

Frequently asked questions

What is LCM?: The Least Common Multiple (LCM) of two integers is the smallest positive integer that is divisible by both numbers.