Ratio Calculator

Math Calculators

Simplify ratios or solve for missing values in a proportion.

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Simplified Ratio

About This Tool

Free online Ratio Calculator. Simplify ratios (e.g., 10:20 to 1:2) or calculate the fourth value in a ratio proportion like A:B = C:D.

Frequently Asked Questions

A ratio is a mathematical comparison of two numbers, showing how many times one value contains another or how they relate in terms of size.

To simplify a ratio, find the greatest common divisor (GCD) of both numbers and divide each number by that value until they cannot be divided further.

Ratios are used everywhere, from kitchen recipes (2 parts water to 1 part rice) to map scales and aspect ratios on television screens.

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