Power Factor Calculator
Built for competitive shooters. Fast, simple, accurate.
Meets the numerical 125 PF threshold
Power Factor Requirements
Compare your calculated result with competition scoring thresholds.
USPSA Handgun Power Factor
United States Practical Shooting Association
| Scoring Category | Minimum PF |
|---|---|
| Minor | 125 |
| Major | 165 |
Major scoring eligibility depends on the applicable USPSA division, caliber, firearm, and current rules. Some divisions do not recognize Major scoring.
IDPA Power Factor Requirements
International Defensive Pistol Association
| Division | Minimum PF |
|---|---|
| Custom Defensive Pistol (CDP) | 165 |
| Stock Service Pistol (SSP) | 125 |
| Compact Carry Pistol (CCP) | 125 |
| Enhanced Revolver (REV) | 155 |
| Stock Revolver (REV) | 105 |
| Back Up Gun (BUG) | 95 |
Refer to the current IDPA rulebook for division classifications, equipment requirements, and official chronograph procedures.
What Is Power Factor?
Power factor is a calculation used in practical shooting competitions to determine ammunition scoring classification. It combines bullet weight, measured in grains, with velocity, measured in feet per second.
Example Power Factor Calculation
A 124-grain bullet traveling at 1,050 feet per second produces a power factor of 130.20.
Why Does Power Factor Matter?
In practical shooting competitions, ammunition power factor can affect scoring classification. Meeting a numerical threshold does not automatically qualify a firearm or ammunition combination for a particular division or scoring category.
Why Might Your Results Vary?
Actual velocity can vary depending on the firearm, barrel length, ammunition lot, environmental conditions, and chronograph measurements. Use your own measured velocity when calculating power factor.