Enter the path length (m) and the reference integer into the Calculator. The calculator will evaluate the Destructive Frequency. 

Destructive Frequency Formula

DF = L / (n+1/2)


  • DF is the Destructive Frequency (hz)
  • L is the path length (m)
  • n is the reference integer

To calculate Destructive Frequency, divide the path length by the sum of the reference integer plus .5.

How to Calculate Destructive Frequency?

The following steps outline how to calculate the Destructive Frequency.

  • First, determine the path length (m). 
  • Next, determine the reference integer. 
  • Next, gather the formula from above = DF = L / (n+1/2).
  • Finally, calculate the Destructive Frequency.
  • 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.

path length (m) = 3

reference integer = 8