How many numbers can I enter?

As many as you like, separated by commas, spaces, or new lines.

What algorithm is used?

The Euclidean algorithm for GCD, then LCM is derived from the GCD of each pair.

Are negative numbers supported?

Their absolute value is used automatically.

GCD & LCM Calculator

Find the greatest common divisor and least common multiple of numbers.

Works Offline

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No Login

No API

Numbers

Enter two or more positive integers

Results

GCD

LCM

360

About the GCD & LCM Calculator

Enter two or more positive integers to instantly compute their greatest common divisor (GCD) and least common multiple (LCM) using the Euclidean algorithm.

Examples

GCD/LCM of 24, 36, 60

24, 36, 60

Output

GCD: 12, LCM: 360

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-07 · Runs entirely in your browser