How is a ratio simplified?

Both numbers are divided by their greatest common divisor (GCD) until no common factor remains.

Can I simplify a ratio of three or more numbers?

This tool handles two-part ratios; for three-part ratios, simplify pairs sequentially using the same GCD approach.

Calculators Education

Ratio Calculator

Simplify a ratio to its lowest terms.

First value

Second value

Simplified ratio

2:3

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About this tool

Enter two values to instantly simplify their ratio to the lowest whole-number terms, using the greatest common divisor — useful for recipes, scale models, and math homework.

How to use this tool

1
Enter both values
Type the two numbers in your ratio.
2
Read the simplified ratio
See the ratio reduced to its lowest whole-number terms.

Frequently asked questions

How is a ratio simplified?: Both numbers are divided by their greatest common divisor (GCD) until no common factor remains.
Can I simplify a ratio of three or more numbers?: This tool handles two-part ratios; for three-part ratios, simplify pairs sequentially using the same GCD approach.