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LCM & GCF Calculator
Find the least common multiple (LCM) and greatest common factor (GCF/HCF) of two numbers.
How to use this tool
- 1Paste or type your input above.
- 2The result updates instantly.
- 3Copy the output with one click.
Frequently asked questions
How are LCM and GCF related?+
For any two numbers, LCM Γ GCF = a Γ b. So once you know one (via prime factors or the Euclidean algorithm), the other follows directly.
Is my data private?+
Yes. The tool runs entirely in your browser β nothing you paste or type is uploaded to a server.
Learn more
- LCM & GCF Calculator: formula and example
- lcm calculator explained
- Common mistakes with lcm calculator