Enter the channel throughput (b/s), the channel bandwidth (hz), and the channel utilization (%) into the calculator to determine the Spectral Efficiency. 

Spectral Efficiency Formula

The following formula is used to calculate the Spectral Efficiency.

Espect = T / (B*U/100)

  • Where (b/s/Hz) is the Spectral Efficiency ((b/s/Hz))
  • T is the channel throughput (b/s) 
  • B is the channel bandwidth (hz) 
  • U is the channel utilization (%) 

How to Calculate Spectral Efficiency?

The following example problems outline how to calculate the Spectral Efficiency.

Example Problem #1

  1. First, determine the channel throughput (b/s). In this example, the channel throughput (b/s) is given as 75 .
  2. Next, determine the channel bandwidth (hz). For this problem, the channel bandwidth (hz) is given as  200 .
  3. Next, determine the channel utilization (%). In this case, the channel utilization (%) is found to be 75.
  4. Finally, calculate the Spectral Efficiency using the formula above: 

Espect = T / (B*U/100)

Inserting the values from above and solving yields: 

Espect = 75/ (200*75/100) = .50 ((b/s/Hz))


Example Problem #2

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as:

channel throughput (b/s) = 50

channel bandwidth (hz) = 300

channel utilization (%) = 20

Enter these given values yields: 

Espect = 50 / (300*20/100) = .833 ((b/s/Hz))