GCD and LCM calculator

Find the greatest common divisor and least common multiple.

Runs on your device Works offline after setup All Utilities

First integer

Second integer

Enter your values, then choose Calculate.

Limits

Safe whole-number inputs. LCM is calculated exactly with integer arithmetic. Approximate real-number outputs use 12 significant digits unless a unit specifies otherwise.
Desktop limits are provisional. Physical mobile and Safari verification remains open.

What happens to your data

GCD and LCM calculator runs inside this browser tab, and the page's code comes from this site. There is no application server to receive your data, and the site's security policy limits connections to this site.

How local processing works

Good to know

Safe whole-number inputs. LCM is calculated exactly with integer arithmetic. Approximate real-number outputs use 12 significant digits unless a unit specifies otherwise.
Desktop limits are provisional. Physical mobile and Safari verification remains open.