LCM Calculator
⚡ Find LCM instantly with step-by-step solutions. Works with 2, 3, or 4 numbers. 100% free.
The Best LCM Calculator Online
Our LCM calculator is designed for students who want to actually understand math. We show you the complete solution step-by-step, so you actually LEARN - not just get answers. The Least Common Multiple (LCM) is essential for adding fractions with different denominators and solving problems with periodic events. No signup, no ads, just instant accurate results.
Using GCD
LCM(a, b) = (a × b) / GCD(a, b)The most efficient method using GCD
Prime Factorization
LCM = Product of highest powers of all primesFind LCM by taking maximum power of each prime
Examples
LCM of 12 and 18
LCM of 4, 6, 8
Frequently Asked Questions
Is this LCM calculator free?
Yes! Our LCM calculator is 100% free with no hidden costs, no signup required, and no annoying popup ads.
What is the relationship between LCM and GCD?
For any two numbers a and b: LCM(a,b) × GCD(a,b) = a × b. This relationship provides an efficient way to calculate LCM.
How do you find LCM of three numbers?
Find LCM of first two numbers, then find LCM of that result with the third number. LCM(a,b,c) = LCM(LCM(a,b), c)
When do we use LCM in real life?
LCM is used for scheduling (when will events coincide), adding fractions, finding common time periods, and many engineering applications.