In American Football, passer rating is a measure of the performance of passers, primarily quarterbacks. Passer rating is calculated using a player's passing attempts, completions, yards, touchdowns, and interceptions. Passer rating in the NFL is measured on a scale from 0 to 158.3, with a higher passer rating reflecting a stronger overall performance. Since 1973, passer rating has been the official formula used by the NFL to determine its passing leader.