Enter the total number of labor hours and the labor efficiency (%) into the Non-Productive Hours Calculator. The calculator will evaluate the Non-Productive Hours. 

Non-Productive Hours Formula

The following two example problems outline the steps and information needed to calculate the Non-Productive Hours.

NPH = LH * (1-LE/100)

Variables:

  • NPH is the Non-Productive Hours (hours)
  • LH is the total number of labor hours 
  • LE is the labor efficiency (%) 

How to Calculate Non-Productive Hours?

The following steps outline how to calculate the Non-Productive Hours.


  1. First, determine the total number of labor hours. 
  2. Next, determine the labor efficiency (%). 
  3. Next, gather the formula from above = NPH = LH * (1-LE/100).
  4. Finally, calculate the Non-Productive Hours.
  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 number of labor hours = 100

labor efficiency (%) = 75

NPH = LH * (1-LE/100) = ?