Enter the drag coefficient and the frontal projected area into the Effective Projected Area Calculator. The calculator will evaluate the Effective Projected Area.

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## Effective Projected Area Formula

The following two example problems outline the steps and information needed to calculate the Effective Projected Area.

EPA = D * FPA

- Where EPA is the Effective Projected Area
- D is the drag coefficient
- FPA is the frontal projected area

To calculate the effective projected area, multiply the drag coefficient by the frontal projected area.

## How to Calculate Effective Projected Area?

The following example problems outline how to calculate Effective Projected Area.

Example Problem #1:

- First, determine the drag coefficient.
- The drag coefficient is given as: .75.

- Next, determine the frontal projected area.
- The frontal projected area is provided as: 300.

- Finally, calculate the Effective Projected Area using the equation above:

EPA = D * FPA

The values provided above are inserted into the equation below and computed.

EPA = .75 * 300 = 225

Example Problem #2:** **

For this problem, the variables required are provided below:

drag coefficient = .50

frontal projected area = 100

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

EPA = D * FPA** = ?**