Enter the weight at sea level (pounds) and the total altitude (ft) into the Altitude Weight Calculator. The calculator will evaluate the Altitude Weight. 

Altitude Weight Formula

The following two example problems outline the steps and information needed to calculate the Altitude Weight.

ALTW = WSL - A /10,000 * .08


  • ALTW is the Altitude Weight (pounds)
  • WSL is the weight at sea level (pounds) 
  • A is the total altitude (ft) 

To calculate weight at altitude, divide the total altitude by 10,000, multiply by .08, then subtract this result from the weight at sea level.

How to Calculate Altitude Weight?

The following steps outline how to calculate the Altitude Weight.

  1. First, determine the weight at sea level (pounds). 
  2. Next, determine the total altitude (ft). 
  3. Next, gather the formula from above = ALTW = WSL – A /10,000 * .08.
  4. Finally, calculate the Altitude Weight.
  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.

weight at sea level (pounds) = 200

total altitude (ft) = 30,000

ALTW = WSL – A /10,000 * .08 = ?