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How to use GCD & LCM Calculator

Enter 2 to 5 whole numbers separated by commas and the calculator returns the GCD, the LCM and each intermediate step.

Frequently asked questions

What are GCD and LCM?

GCD is the largest number that divides all inputs; LCM is the smallest number they all divide into.

How are they computed?

The GCD uses the Euclidean algorithm; the LCM uses the identity LCM(a,b) = |a×b| / GCD(a,b), applied across all numbers.

How many numbers can I enter?

Between 2 and 5 numbers, separated by commas or spaces.

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