The NFL passer rating (also called QBR, though technically distinct) scores a quarterback on four components: completion percentage, yards per attempt, touchdown percentage and interception percentage. Each is clamped to a 0–2.375 range, averaged and scaled so a perfect rating is 158.3. A season average above 100 is excellent; the maximum of 158.3 requires completing all passes, averaging 11.875 Y/A, throwing for TDs on 11.875% of attempts and never throwing an interception.
Key points
- Four components: comp%, Y/A, TD%, INT%
- Each clamped to 0–2.375
- Perfect rating = 158.3
- Season average 100+ is elite
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