Enter the total signal power and the total bandwidth into the Power Spectral Density Calculator. The calculator will evaluate and display the Power Spectral Density. 

Power Spectral Density Formula

The following formula is used to calculate the Power Spectral Density. 

PSD = P / BW
  • Where PSD is the Power Spectral Density ( )
  • P is the total signal power  
  • BW is the total bandwidth  

To calculate the spectral density, divide the signal power by the total bandwidth.

How to Calculate Power Spectral Density?

The following example problems outline how to calculate Power Spectral Density.

Example Problem #1:

  1. First, determine the total signal power .
    1. The total signal power is given as: 40.
  2. Next, determine the total bandwidth .
    1. The total bandwidth is provided as: 10.
  3. Finally, calculate the Power Spectral Density using the equation above: 

PSD = P / BW

The values given above are inserted into the equation below:

PSD = 40 / 10 = (4 )

Example Problem #2: 

For this problem, the variables needed are provided below:

total signal power  = 75

total bandwidth  = 20

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

PSD = P / BW = ?