Numbers & calculations

GCD & LCM

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

How to use
Free. Always.Inputs stay in your browserNo sign-up

Your saved tools stay in this browser.

GCD & LCM — workspace

Loading your tool…

How to use: GCD & LCM

  1. Start with the example, or replace it with your own values.

  2. Review Text or data, then select “Get result”.

  3. Read the result, then copy or download it. Edit any input to try again.

What you can do

  • Find the greatest common divisor and least common multiple of positive whole numbers.

What you get

  • A result you can review, copy or download. Numeric tools show labeled calculations; text tools show the transformed output.

What you need

Text or data
Enter or paste your value, or start with the example.

Try an example

Text or data
12 18 24
Try it in the tool

Good to know

  • Use a current browser with JavaScript enabled. Available formats and speed depend on your browser, device and input size.

Your work stays on your device

Your files and entered values are processed in your browser and are not uploaded for processing. The website and any required processing engines still download from the site.

Questions & answers

Is GCD & LCM free?

Yes. GCD & LCM is free to use and does not require an account.

Are my files or entered values uploaded?

Your files and entered values are processed in your browser and are not uploaded for processing. The website and any required processing engines still download from the site.

What result can I save?

A result you can review, copy or download. Numeric tools show labeled calculations; text tools show the transformed output.

What should I check before using the result?

Use a current browser with JavaScript enabled. Available formats and speed depend on your browser, device and input size.

Keep going with another tool

Unit converter Convert 246 units across everyday, scientific and engineering measurements.Percentage change See the increase or decrease between two values.Discount calculator Find the final price and how much you save.Tip & bill splitter Add a tip and split the total evenly.Number statistics Find the mean, median, sum, minimum and maximum.