GCF & LCM Calculator
Find the greatest common factor and least common multiple.
Result
Results are estimates for general information only and are not professional advice.
GCF and LCM
The greatest common factor is the largest number that divides both values, while the least common multiple is the smallest number both divide into. Both are fundamental for simplifying fractions and solving number problems.
Frequently Asked Questions
What is the GCF & LCM Calculator?
Find the greatest common factor and least common multiple. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the GCF & LCM Calculator?
The GCF & LCM Calculator asks for the following values (2): First number, Second number. Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the GCF & LCM Calculator?
The GCF & LCM Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the GCF & LCM Calculator free, and do I need an account?
Yes. The GCF & LCM Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.