Enter the total power (watts), the total length (ft), and the total width (ft) into the Power Density Calculator. The calculator will evaluate and display the Power Density. 

Power Density Formula

The following formula is used to calculate the Power Density. 

Dp = P / (L*W)
  • Where Dp is the Power Density (W/ft^2)
  • P is the total power (watts) 
  • L is the total length (ft) 
  • W is the total width (ft) 

To calculate the power density, divide the power by the product of the length and the width.

How to Calculate Power Density?

The following example problems outline how to calculate Power Density.

Example Problem #1

  1. First, determine the total power (watts).
    1. The total power (watts) is given as 300.
  2. Next, determine the total length (ft).
    1. The total length (ft) is calculated as: 3.
  3. Next, determine the total width (ft).
    1. The total width (ft) is found to be: 10.
  4. Finally, calculate the Power Density using the formula above: 

Dp = P / (L*W)

Inserting the values from above yields: 

Dp = 300 / (3*10) = 10 (W/ft^2)

Example Problem #2

The variables needed for this problem are provided below:

total power (watts) = 500

total length (ft) = 1206

total width (ft) = 5

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. Dp = P / (L*W) = (W/ft^2)