Enter the pound force (lbf) and the acceleration due to gravity (ft/s^2) into the Pound Mass Calculator. The calculator will evaluate and display the Pound Mass. 

Pound Mass Formula

The following formula is used to calculate the Pound Mass. 

PM = PF / a
  • Where PM is the Pound Mass (lbs)
  • PF is the pound force (lbf) 
  • a is the acceleration due to gravity (ft/s^2) 

To calculate pound mass from pound force, divide the pound-force by the acceleration.

How to Calculate Pound Mass?

The following example problems outline how to calculate Pound Mass.

Example Problem #1:

  1. First, determine the pound force (lbf).
    • The pound force (lbf) is given as: 500.
  2. Next, determine the acceleration due to gravity (ft/s^2).
    • The acceleration due to gravity (ft/s^2) is provided as: 32.174049.
  3. Finally, calculate the Pound Mass using the equation above: 

PM = PF / a

The values given above are inserted into the equation below and the solution is calculated:

PM = 500 / 32.174049 = 15.540 (lbs)

Example Problem #2: 

For this problem, the variables needed are provided below:

pound force (lbf) = 600

acceleration due to gravity (ft/s^2) = 32.174049

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

PM = PF / a = ?