Enter the bullet weight (grains) and the velocity (fps) into the Power Factor Calculator. The calculator will evaluate the Power Factor.

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## Power Factor Formula

The following two example problems outline the steps and information needed to calculate the Power Factor.

**PF = W * V / 1000**

Variables:

- PF is the Power Factor ((gr-fps))
- W is the bullet weight (grains)
- V is the velocity (fps)

## How to Calculate Power Factor?

The following steps outline how to calculate the Power Factor.

- First, determine the bullet weight (grains).
- Next, determine the velocity (fps).
- Next, gather the formula from above = PF = W * V / 1000.
- Finally, calculate the Power Factor.
- 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.

the bullet weight (grains) = 125

velocity (fps) = 1000

PF = W * V / 1000** **= ?