Quarterback Passer Rating Calculator
These formulae were created in 1973 and updated in 1979. These are complicated for comparison use. The average standard, is 1.000. The bottom is .000. To earn a 2.000 rating, a passer must perform at exceptional levels, i.e., 70 percent in completions, 10 percent in touchdowns, 1.5 percent in interceptions, and 11 yards average gain per pass attempt. The maximum a passer can receive in any category is 2.375. These are the formula factors used in determining the statistics calculation:
1. Complete passes divided by pass attempts. Subtract 0.3 and divide by 0.2
To gain a 2.375 in completion percentage, a passer would have to complete 77.5 percent of his passes.
2. Passing yards divided by pass attempts. Subtract 3 and divide by 4.
To earn a 2.375 in percentage of yards per attempt, a passer would have to achieve an average of 12.5 yards.
3. Touchdown passes divided by pass attempts and divide by .05.
To earn a 2.375 in percentage of touchdowns, a passer would have to achieve a percentage of 11.9.
4. Start with .095 and subtract interceptions divided by pass attempts. Divide that product by .04.
To gain 2.375 in percentage of interceptions, a passer would have to go the entire season without an interception.
Add the sum of 1-4, multiply by 100 and divide by 6.
Average Pass Yardage = Passing Yardage / Completed Passes
Completed Passes Percentage = Complete Passes / Pass Attempts
Touchdown Passes Percentage = Touchdown Passes / Pass Attempts
Intercepted Passes Percentage = Intercepted Passes / Pass Attempts
Calculation Note: If the following ratings fall outside of their specific rules, the value is set to the point that it failed the rule.
Completion Percentage : Completions rating must be between 0 and 2.375.
Yards Per Attempt : Yards rating must be between 0 and 2.375.
Touchdown Percentage : Touchdown rating must be 2.375 or less.
Interception Percentage : Interception rating must be 0 or greater.