Ratio Calculator
Simplify any ratio to its smallest whole-number form, for example 12:18 becomes 2:3.
Quick answer: enter your details below and click Calculate — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
R
Calculators
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How to use
- Enter the first part of the ratio.
- Enter the second part of the ratio.
- Calculate to see the simplified ratio.
About this tool
Enter the two parts of a ratio and the tool divides both by their greatest common divisor. The result is the same comparison written as simply as possible, which makes recipes, mixes and scale drawings much easier to read.
Frequently asked questions
What if my ratio has decimals?
Use whole numbers for the cleanest result. If you have decimals, multiply both parts by the same power of ten first to turn them into whole numbers.
Can a ratio be simplified to 1:1?
Yes. If both parts are equal, the simplified ratio is 1:1, meaning the two parts are the same size.