Everyday utility

Least Common Multiple Calculator

Find the Least Common Multiple (LCM) of two or more integers — the smallest number divisible by all of them. Use this Data and utilities tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
Related tools

Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

LCM(a, b) = a × b / GCD(a, b). The LCM is used when adding fractions with different denominators, scheduling repeating events, and in number theory.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

How do I find the LCM?

LCM(a,b) = (a × b) / GCD(a,b). You can also find it by listing multiples of each number until you find a common one, or by prime factorization.