Ratio Calculator
CalculatorsSimplify ratios, find a missing ratio value, and compare two ratios instantly.
Simplify a ratio
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Simplified: —
Find a missing value
:=:?
Compare two ratios
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Quick reference
- Simplify by dividing both sides by their greatest common divisor.
- Missing value: a:b = c:x → x = (b × c) ÷ a
- Two ratios are equal when a÷b = c÷d.
What you can do with this tool
- Simplify a recipe or mixing ratio
- Find a missing value in a proportion
- Check which of two ratios is larger
Frequently asked questions
- How do I simplify a ratio?
- Divide both sides of the ratio by their greatest common divisor — the calculator does this automatically.