Enter the total length (in) and the total diameter (in) into the Calculator. The calculator will evaluate the Length-To-Diameter Ratio. 

Length-To-Diameter Ratio Formula

LDR = L / D


  • LDR is the Length-To-Diameter Ratio (in/in)
  • L is the total length (in)
  • D is the total diameter (in)

To calculate Length-To-Diameter Ratio, divide the overall length by the total diameter.

How to Calculate Length-To-Diameter Ratio?

The following steps outline how to calculate the Length-To-Diameter Ratio.

  1. First, determine the total length (in). 
  2. Next, determine the total diameter (in). 
  3. Next, gather the formula from above = LDR = L / D.
  4. Finally, calculate the Length-To-Diameter Ratio.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total length (in) = 1.25

total diameter (in) = 4.5