Enter the blank diameter (in) and the diametral pitch (in) into the Knurling Calculator. The calculator will evaluate the Knurling. 

Knurling Formula

The following two example problems outline the steps and information needed to calculate the Knurling.

K = BD / DP


  • K is the Knurling ( )
  • BD is the blank diameter (in) 
  • DP is the diametral pitch (in) 

To calculate the knurling, divide the blank diameter by the diametral pitch.

How to Calculate Knurling?

The following steps outline how to calculate the Knurling.

  1. First, determine the blank diameter (in). 
  2. Next, determine the diametral pitch (in). 
  3. Next, gather the formula from above = K = BD / DP.
  4. Finally, calculate the Knurling.
  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.

blank diameter (in) = 30

diametral pitch (in) = 45

K = BD / DP = ?