Ratio Calculator
Simplify a ratio and convert it.
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Simplify and convert a ratio
A ratio compares two quantities, such as 16 to 9 for a widescreen display or parts of one ingredient to another in a recipe. Enter both values and this tool reduces whole-number ratios to their simplest form by dividing out the greatest common factor, then shows the same relationship as a decimal and as a percentage. It updates as you type, so you can experiment with different pairings and read all three forms at once.
Reading the three forms
The simplified ratio is best for recipes and aspect ratios, the decimal suits scaling, and the percentage shows how big the first value is relative to the second.
Frequently asked questions
Can it simplify ratios with decimals?
Simplification to a clean A to B form applies to whole numbers. For decimal inputs you still get the decimal and percentage forms.
What does the percentage mean?
It expresses the first value as a percentage of the second, so 16 to 9 reads as about 178 percent.