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 Equation Calculator (Drag Force Calculator)
- Drag Coefficient Calculator
- Lift to Drag Ratio Calculator

## 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)

To calculate the drag per unit span, divide the total drag force by the total span.

## How to Calculate Drag Per Unit Span?

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

- First, determine the total drag force (N).
- Next, determine the total span (m).
- Next, gather the formula from above = DPUS = Fd/ S.
- Finally, calculate the Drag Per Unit Span.
- 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** **= ?