All tools
Ratio Calculator
Reduce a ratio to its simplest whole-number form. Runs entirely in your browser.
Your inputs never leave your device.
Reduce a ratio to its simplest whole-number form, for recipes, mixes, aspect ratios, and comparisons.
How to use
- Enter the two values of your ratio.
- Calculate to see it simplified to lowest terms.
Frequently asked questions
How do I simplify a ratio?
Divide both numbers by their greatest common divisor. For example, 10:20 simplifies to 1:2 and 9:6 to 3:2. The tool does this for you.
Can I use decimals in a ratio?
This tool works with whole numbers; it rounds inputs to integers before simplifying. For decimal ratios, scale both sides up to whole numbers first.
What is a ratio used for?
Ratios compare quantities, ingredients in a recipe, parts of a mixture, screen aspect ratios, and more.