What Is the NFL Passer Rating Calculator Formula?
Passer rating is a formula-based statistic, adopted by the National Football League in 1973, that combines a quarterback's completion percentage, yards per attempt, touchdown rate, and interception rate into a single number on a scale of 0 to 158.3.
The NFL formula calculates four components, each capped between 0 and 2.375, then averages and rescales them: a = ((Completions ÷ Attempts) − 0.3) × 5, b = ((Yards ÷ Attempts) − 3) × 0.25, c = (Touchdowns ÷ Attempts) × 20, and d = 2.375 − ((Interceptions ÷ Attempts) × 25). The final rating is ((a + b + c + d) ÷ 6) × 100.
A perfect 158.3 rating requires flawless efficiency in all four components at once — at least a 77.5% completion rate, 12.5 yards per attempt, an 11.875% touchdown rate, and zero interceptions on every drop-back. Because all four thresholds must be hit simultaneously, a perfect game rating remains rare even among the NFL's most accurate passers.
How to Use This Passer Rating Calculator
Enter a quarterback's stat line and the calculator updates instantly. Here's what each field means:
- Completions: passes caught by an eligible receiver on the intended team.
- Attempts: total pass attempts, including completions, incompletions, and interceptions (sacks and spikes are excluded under NFL rules).
- Passing Yards: net yards gained through the air on completed passes.
- Touchdowns: passing touchdowns thrown.
- Interceptions: passes caught by the defense — the stat that most heavily penalizes the rating.
Switch between the NFL Rating tab and the NCAA Efficiency tab to see how the same stat line scores under each governing body's formula. The NCAA uses a different, uncapped passing efficiency formula for college football, so the two numbers are not directly comparable.
What Does a Passer Rating of 100+ Mean?
A rating of 100 or higher is generally considered elite production for an NFL quarterback over a full season, typically placing a passer among the league's top statistical performers. Ratings in the 70s represent a roughly league-average full-season performance, based on historical single-season leaderboards published by outlets such as Pro Football Reference.
| Rating Range | Informal Tier | Typical Context |
|---|---|---|
| 158.3 | Perfect Game | Maximum possible score; requires flawless efficiency across all four components |
| 100 and above | Elite | Among a season's top statistical passers |
| 90 – 99.9 | Very Good | Playoff-caliber, above-average starter |
| 80 – 89.9 | Above Average | Solid, competent starting quarterback |
| 70 – 79.9 | League Average | Typical full-season starter production |
| 60 – 69.9 | Below Average | Struggling performance, often a single bad game |
| Below 60 | Poor | Rare for a full season; more common in a single rough outing |
Frequently Asked Questions
What is a good passer rating in the NFL?
A single-game or season passer rating of 100 or higher is generally considered elite, while ratings in the high 80s to 90s reflect a strong starting-caliber quarterback. A rating in the 70s is roughly league average for a full-season starter, and anything below 60 signals a difficult stretch of games.
How accurate is this passer rating calculator?
This calculator applies the NFL's official 1973 passer rating formula and the NCAA's passing efficiency formula exactly as published, so results match official box-score ratings whenever the same completions, attempts, yards, touchdowns, and interceptions are entered. It does not account for rushing yards, sacks, or fumbles, since neither official formula includes them.
What is the difference between NFL passer rating and NCAA passing efficiency?
NFL passer rating is bounded between 0 and 158.3 because each of its four components is individually capped at 2.375, so no single stat can dominate the score. NCAA passing efficiency has no such cap — it applies fixed weights (8.4 per yard, 330 per touchdown, 100 per completion, minus 200 per interception) directly to raw totals, so college ratings can climb well above 158.3 or fall below zero in extreme cases.
Why don't sacks or rushing yards count toward passer rating?
Both the NFL and NCAA formulas were designed specifically to measure passing efficiency — how well a quarterback throws the ball — not overall offensive production. Rushing yards, sacks, and fumbles are tracked separately and factor into other quarterback evaluation metrics, such as ESPN's proprietary QBR, which does incorporate them.
