Enter the length of your index finger (in) and the length of your ring finger (in) into the Digit Ratio Calculator. The calculator will evaluate and display the Digit Ratio. 

Digit Ratio Formula

The following formula is used to calculate the Digit Ratio. 

DR = 2D / 4D

  • Where DR is the Digit Ratio ( )
  • 2D is the length of your index finger (in) 
  • 4D is the length of your ring finger (in) 

How to Calculate Digit Ratio?

The following example problems outline how to calculate Digit Ratio.

Example Problem #1:

  1. First, determine the length of your index finger (in). 
    • The length of your index finger (in) is given as: 2.125.
  2. Next, determine the length of your ring finger (in). 
    • The length of your ring finger (in) is provided as: 2.35.
  3. Finally, calculate the Digit Ratio using the equation above: 

DR = 2D / 4D

The values given above are inserted into the equation below and the solution is calculated:

DR = 2.125 / 2.35 = .904


Example Problem #2: 

For this problem, the variables required are provided below:

length of your index finger (in) = 2.5

length of your ring finger (in) = 3

Test your knowledge using the equation and check your answer with the calculator above.

DR = 2D / 4D = ?