NFL & CFL
The calculation of the NFL (and CFL) passer rating involves more steps than the NCAA formula. In order to establish a maximum value for an NFL player's passer rating, a separate calculation needs to be completed involving each of the following four categories: Completion Percentage, Average Yards Per Attempt, Percentage of Touchdown Passes, and Percentage of Interceptions. If the result in any category is less than 0, the given result should be 0. If the result in any category is greater than 2.375, the given result should be 2.375. This makes the maximum possible quarterback rating for the NFL 158.3. A perfect rating requires at least a 77.5% completion rate, at least 12.5 yards per attempt, a touchdown on at least 11.875% of attempts, and no interceptions.
The four separate calculations can be expressed in the following equations:
where
- ATT = Number of passing attempts
- COMP = Number of completions
- YARDS = Passing yards
- TD = Touchdown passes
- INT = Interceptions
Then, the above calculations are used to complete the passer rating:
where
Read more about this topic: Passer Rating