Online Calculators > Math Calculators > Proportion Calculator
Proportion Calculator
Proportion Calculator  calculate proportion problems quickly and easily. Online proportions calculator is used to solve proportion problems and find the missing value in a proportion.
Enter 3 numbers and leave 1 empty to solve for the unknown number.
Please fill in 3 fields and leave 1 field blank.
Proportion Formula
Following is the proportion formula that shows how to calculate proportion.
To solve for A, B, C or D when the other 3 are given
A = B*C/D
B = A*D/C
C = A*D/B
D = B*C/A
