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

## 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:

1. First, determine the drag coefficient.
• The drag coefficient is given as: .75.
2. Next, determine the frontal projected area.
• The frontal projected area is provided as: 300.
3. 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