Ratio & Proportion Calculator

Calculate ratios between two or more values and find unknown values using proportions.

Calculation Type

First Number

Second Number

How To Calculate: Ratio & Proportion Calculator

Ratio & Proportion Calculator is calculated by using the required inputs and applying the formula below. Use consistent units for reliable results.

Formula:

If a / b = c / x, then x = (b x c) / a

Worked Example:

Example: 2 / 5 = 8 / x => x = 20.

Results are mathematically consistent with entered values. Input quality and unit consistency directly affect accuracy.

Decimals are supported in most tools. Negative values are accepted only when they are mathematically meaningful for that calculator.

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