Enter the total drag force (N) and the total span (m) into the Drag Per Unit Span Calculator. The calculator will evaluate the Drag Per Unit Span. 

Drag Per Unit Span Formula

The following two example problems outline the steps and information needed to calculate the Drag Per Unit Span.

DPUS = Fd/ S

Variables:

  • DPUS is the Drag Per Unit Span (N/m)
  • Fd is the total drag force (N) 
  • S is the total span (m) 

How to Calculate Drag Per Unit Span?

The following steps outline how to calculate the Drag Per Unit Span.


  1. First, determine the total drag force (N). 
  2. Next, determine the total span (m). 
  3. Next, gather the formula from above = DPUS = Fd/ S.
  4. Finally, calculate the Drag Per Unit Span.
  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 drag force (N) = 500

total span (m) = 30

DPUS = Fd/ S = ?