Ratio Calculator

Simplify a ratio of two numbers to its lowest terms.

Simplified ratio
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Enter values to see a result

How it works

We find the greatest common divisor (GCD) of A and B, then divide both by it.

Example

8:12 has a GCD of 4, simplifying to 2:3.

Assumptions & limitations

Works with positive whole numbers. Decimal inputs are rounded before simplifying.

Frequently asked questions

What if my numbers have decimals?

Round to whole numbers first, or scale both sides by 10, 100, etc. before entering.