Enter the original engine power (HP) and the total altitude (ft) into the HP Loss at Altitude Calculator. The calculator will evaluate the HP Loss at Altitude. 

HP Loss at Altitude Formula

The following two example problems outline the steps and information needed to calculate the HP Loss at Altitude.

HPL = EP * A/1000 *.03


  • HPL is the HP Loss at Altitude (HP loss)
  • EP is the original engine power (HP) 
  • A is the total altitude (ft) 

To calculate HP loss at altitude, multiply the original power (HP) by the total altitude, divide by 1,000, then finally multiply by .03.

How to Calculate HP Loss at Altitude?

The following steps outline how to calculate the HP Loss at Altitude.

  1. First, determine the original engine power (HP). 
  2. Next, determine the total altitude (ft). 
  3. Next, gather the formula from above = HPL = EP * A/1000 *.03.
  4. Finally, calculate the HP Loss at Altitude.
  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.

original engine power (HP) = 300

total altitude (ft) = 5000

HPL = EP * A/1000 *.03 = ?