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Passer rating (also known as passing efficiency in college football) is a measure of the performance of passers, primarily quarterbacks, in gridiron football. There are two formulas currently in use: one used by both the National Football League (NFL) and Canadian Football League (CFL), and the other used in NCAA football. Passer rating is calculated using a player's passing attempts, completions, yards, touchdowns, and interceptions. Passer rating in the NFL is on a scale from 0 to 158.3. Passing efficiency in college football is on a scale from −731.6 to 1261.6.
Since 1973, passer rating has been the official formula used by the NFL to determine its passing leader.
Passer rating is sometimes colloquially referred to as “quarterback rating” or “QB rating”, however the statistic applies only to passing (not to other contributions by a quarterback) and applies to any player at any position who throws a forward pass, not just to quarterbacks.