Mathematics

Ratio Calculator

Simplify ratios and solve proportion problems

Fill in 3 values to find the 4th (A : B = C : D)
: = :
How to Use
  1. A ratio is typically written as A : B = C : D.
  2. Enter any three known values into the boxes above.
  3. Leave the value you want to find empty.
  4. Click Calculate Ratio to find the missing value.

Formula