Math

GCD and LCM calculator

Greatest common divisor and least common multiple of several numbers.

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<iframe src="https://calc.hod-group.com/embed/?hodtool=gcd&amp;hodlang=en" title="GCD and LCM calculator" loading="lazy" style="width:100%;max-width:720px;height:560px;border:0;border-radius:12px" data-hodcalc></iframe>
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How it works

The GCD uses Euclid's algorithm; LCM(a, b) = a × b / GCD(a, b).

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

Whole numbers (separated by spaces)24 36 60

you get:

GCD12
LCM360
Numbers24, 36, 60

Frequently asked questions

How does the “GCD and LCM calculator” tool work?

The GCD uses Euclid's algorithm; LCM(a, b) = a × b / GCD(a, b).

What do I need to enter?

Just fill in: whole numbers. The result updates as you type.

Can you give an example?

Whole numbers (separated by spaces): 24 36 60 → GCD: 12; LCM: 360.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.