Enter the total dB and the total length (in) into the Calculator. The calculator will evaluate the Db Per Inch. 

Db Per Inch Formula

dBi = dB/L


  • dBi is the Db Per Inch (dB/in)
  • dB is the total dB
  • L is the total length (in)

To calculate Db Per Inch, divide the total decibels by the total length.

How to Calculate Db Per Inch?

The following steps outline how to calculate the Db Per Inch.

  1. First, determine the total dB. 
  2. Next, determine the total length (in). 
  3. Next, gather the formula from above = dBi = dB/L.
  4. Finally, calculate the Db Per Inch.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total dB = 120

total length (in) = 100