Ratios and Proportions

The relative values between quantities - ratios and proportions. Calculate ratios, inverse ratios, and verify proportions.

Ratio Calculator

A ratio is the quotient obtained by dividing the first quantity by the second. The ratio between two quantities expresses how many times one quantity is contained in another.

Ratio Formula

Ratio = a / b or expressed as a : b

Inverse Ratio Formula

Inverse Ratio = b / a or expressed as b : a

Proportion

Proportion is the equality of two ratios: a : b = c : d

Calculator

Inputs

Results

Ratio (a:b)--
Inverse Ratio (b:a)--
Ratio (c:d)--
Proportion Check (a:b = c:d)--