Is this GCD and LCM calculator free?

Yes, completely free with no signup and no usage limits.

Does my data leave my device?

No. The Euclidean algorithm runs entirely in your browser. No data is sent anywhere.

Does it work on mobile?

Yes. Works on iPhone Safari and Android Chrome without installing any app.

What is the difference between GCD and LCM?

GCD (Greatest Common Divisor) is the largest integer that divides both numbers without a remainder. LCM (Least Common Multiple) is the smallest positive integer that is divisible by both numbers. They are related by: GCD × LCM = a × b.

GCD & LCM Calculator

Compute the greatest common divisor (GCD) and least common multiple (LCM) of any two positive integers instantly, free and 100% in your browser.

100% client-side · no upload

First number Second number

How to use

Enter two positive integers in the input fields.
The GCD and LCM update automatically as you type.
GCD is the largest integer that divides both numbers evenly. LCM is the smallest positive integer divisible by both.

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Frequently Asked Questions

Is this GCD and LCM calculator free?: Yes, completely free with no signup and no usage limits.
Does my data leave my device?: No. The Euclidean algorithm runs entirely in your browser. No data is sent anywhere.
Does it work on mobile?: Yes. Works on iPhone Safari and Android Chrome without installing any app.
What is the difference between GCD and LCM?: GCD (Greatest Common Divisor) is the largest integer that divides both numbers without a remainder. LCM (Least Common Multiple) is the smallest positive integer that is divisible by both numbers. They are related by: GCD × LCM = a × b.

Last updated: 2026-05-20 By jarvisbox