Math & Calculators•Free & Browser-Based

LCM Calculator

Find the Least Common Multiple (LCM) of two or more numbers with prime factorization steps.

First Number

Second Number

Least Common Multiple (LCM)

Greatest Common Divisor (GCD / HCF)

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What is the Free Online LCM Calculator?

The Least Common Multiple (LCM) of two or more integers is the smallest positive integer that is evenly divisible by all of them.

100% Client-Side Privacy: Calculations and data processing occur entirely in your local browser memory. Zero files or personal inputs are uploaded to our servers.

How to Use LCM Calculator Online: Step-by-Step Guide

1Enter two or more integers separated by commas or spaces.
2Click "Calculate LCM".
3View the LCM alongside prime factorizations for each input number.

Real-World Calculation Example

LCM of 12 and 18: $12 = 2^2 \times 3$, $18 = 2 \times 3^2$. $\text{LCM} = 2^2 \times 3^2 = 36$.

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