Football Passer Rating Calculator

Despite the "QBR" name, this uses the NFL's original passer rating formula (not ESPN's separate proprietary Total QBR metric) — the same four-component calculation that's been the league's official passing statistic since 1973. Four per-attempt ratios are each converted into a component score: completion percentage minus 30%, times 5; yards per attempt minus 3, times 0.25; touchdown percentage times 20; and interception percentage, where 2.375 minus interceptions-per-attempt times 25 rewards fewer picks. Each of those four components is clamped to a 0-to-2.375 range before being combined — the formula's built-in ceiling means a quarterback can't rack up an unbounded score just by throwing an absurd number of touchdowns per attempt, which is also why the maximum possible passer rating is a fixed 158.3 (four components at their 2.375 cap, averaged and multiplied by 100), often called a "perfect rating." The four clamped components are averaged and multiplied by 100 to get the final number people recognize from broadcasts.

The rating category buckets (1 through 5) layer a simple, unofficial read on top of that number: below 70 is Below Average, 70-79 Average, 80-89 Good, 90-99 Excellent, and 100+ Elite. Worth knowing: this formula rewards accuracy and scoring while punishing interceptions, but it says nothing about sacks, rushing production, fumbles, or the quality of opposing defenses — it measures the passing performance in isolation, which is exactly why analytics-minded observers often pair it with (or replace it with) other metrics like QBR or ANY/A for a fuller picture.