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Ratio calculator

Simplify two integers into their smallest equivalent ratio.

Free. No account needed.

Optional equipment

An optional suggestion for your wider workspace: a security key can be used with online accounts that support it. This tool does not require one.

You do not need to buy anything to use this free tool.

As an Amazon Associate I earn from qualifying purchases.

Inputs are processed on your device. Check results before using them.

Formula, method and rounding

a:b → (a / GCD):(b / GCD)

Both values must be integers. The greatest common divisor cancels common factors.

Currency follows the rule above; other numeric results display up to 12 significant digits. Inputs are limited by JavaScript number precision. Verify results before critical use.

Result

Enter your values. Your result will appear here.

Share this tool

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How it works

  1. Enter the first and second terms as integers, preserving the order you want to describe.
  2. Calculate to divide both terms by their greatest common divisor.
  3. Check that 1920:1080 becomes 16:9; 1080:1920 instead becomes 9:16.

Example & practical use

1920:1080 simplifies to 16:9.

Limits and help

Results use floating-point arithmetic; verify precision for critical work.

Your files are yours.

Image and text processing happens in your browser. Your files are not uploaded to our servers.

Troubleshooting

Check the unit for each field. Use a decimal point without thousands separators in numeric fields. A blank value is not the same as zero. Verify important results independently.

Report an issue and track its status · Contact · Contact

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