Find Greatest Common Divisor

Find Greatest Common Divisor gives you a quick way to calculate the GCD of two or more numbers. Just type them in, separated by commas, and it’ll figure out the largest number that divides all of them without a remainder. You don’t need to format anything fancy it handles spacing and filters invalid entries too.

This tool is perfect when you’re simplifying ratios, working through math problems, or verifying outputs in code. And once the result shows up, you can copy it with one click or export it to a text file for later use. It’s clean, fast, and works entirely in the browser.

Paste your input above or import a file below.
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Supported file types: .txt, .csv, .tsv, .log, .json, .xml, .md, .ini, .yaml, .yml, .html, .htm, .css
Total items: 1

How to Use:

  1. Enter your numbers in the input box, separated by commas (like 48, 180).
  2. Click “Calculate” or just type to see the result update live.
  3. The GCD will be displayed in the output box below.
  4. Click “Copy Output” to copy the result to your clipboard.
  5. Use “Export to File” to download it as a .txt file.
  6. Click “Clear All” to reset everything and start again.

Example:

Input:

48, 180

Output:

12

You can enter more than two numbers too it’ll still calculate the correct GCD.

Common Use Cases:

Find Greatest Common Divisor is useful for math teachers, students, and developers. It helps with reducing fractions, solving Diophantine equations, simplifying ratios, or just checking the behavior of number sets in code. Whether you’re teaching, studying, or building tools, this gives you a fast and reliable way to get the answer without needing a calculator or scripting it yourself.

Useful Tools & Suggestions:

After locking in the GCD, Find Least Common Multiple gives you the opposite view how numbers come together instead of just what they share. And if you’re testing patterns, Generate a Sequence of Squares can offer some interesting comparisons.

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