Ratio Calculator (Proportion Calculator)

About this Calculator

Will solve ratios or proportions for the missing value or evaluate as true or false. Ratios, and testing equivalent fractions, in the form 2/4 = 6/12 can be entered below as 2:4 = 6:12.

Ratio Calculator Uses and Formulas:

This calculator will solve ratios, or proportions, for the missing values or tell you if the entered ratio is true or false.

Enter [A and B to find a C and D set] - will multiply A*2 and B*2 to create TRUE values for C and D.

Enter [A, B and C to find D] - will solve for D = C * (B/A)

Enter [A, B and D to find C] - will solve for C = D * (A/B)

Enter [A, B, C and D to find TRUE or FALSE] - will find the values of A/B and C/D and compare the results to find TRUE or FALSE.

If you want to simplify a fraction use our simplification of fractions calculator.