How to Calculate the NFL QB Rating

Sports are ultimately about wins and losses and the countless statistics. Statistics are the yardsticks by which players, media and fans measure one player against another. One of the most confusing statistics in sports is the quarterback rating, which the National Football League uses to gauge a quarterback's performance.

Instructions

    • 1

      Subtract 30% or .3 from the quarterback's completion percentage and then divide that number by 20% or .2. To obtain the completion percentage for a passer take the number of passes completed and divide that figure by the number of passes thrown.

    • 2

      Take the average yardage gained per pass play, subtract three and divide that figure by four. To calculate the average yards per pass play, simply take the total passing yards and divide that number by the amount of completions the quarterback threw.

    • 3

      Calculate the touchdown percentage for the passer and divide by 5% or .05. To ascertain the touchdown percentage, divide the number of touchdown passes thrown by the total number of passes attempted.

    • 4

      Divide the number of interceptions thrown by the number of pass attempts. This gives you the passers interception percentage. Then subtract the interception percentage from 9.5% or .095. Finally, divide that number by 4% or .04.

    • 5

      Add the totals from Steps 1 to 4 and multiply that figure by 100. Then, divide that number by 6, and you have the NFL quarterback rating computed.