Passer rating calculator
Enter pass attempts, completions, passing yards, touchdown passes and interceptions. The NFL formula gives a rating from 0 to a perfect 158.3 and shows its four parts; the NCAA formula gives college passing efficiency, which has no upper cap. Completion, touchdown and interception percentages and yards per attempt are shown too.
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How to use it
- Choose NFL for professional football or NCAA for college football.
- Enter attempts, completions, passing yards, touchdown passes and interceptions for a game or a season.
- Read the rating; with the NFL formula the four parts show what helped and what hurt.
NFL (each part clamped to 0–2.375):
- a = (CMP ÷ ATT − 0.3) × 5
- b = (YDS ÷ ATT − 3) × 0.25
- c = TD ÷ ATT × 20
- d = 2.375 − INT ÷ ATT × 25
- rating = (a + b + c + d) ÷ 6 × 100
NCAA: (8.4 × YDS + 330 × TD + 100 × CMP − 200 × INT) ÷ ATT.
Worked example
20 of 30 for 250 yards, 2 touchdowns, 1 interception:
- a = (0.667 − 0.3) × 5 = 1.833; b = (8.33 − 3) × 0.25 = 1.333;
- c = 0.0667 × 20 = 1.333; d = 2.375 − 0.0333 × 25 = 1.542;
- rating = 6.042 ÷ 6 × 100 = 100.7; NCAA efficiency for the same line: 152.
Tips
- Rating over a few attempts swings wildly; compare seasons or careers, not single drives.
- Interceptions weigh heavily: one fewer interception on 30 attempts adds 0.833 ÷ 6 × 100 ≈ 13.9 points.
- Because each part is capped, a great game in one area cannot make up beyond 2.375 for a weak one.
Frequently asked questions
How is NFL passer rating calculated?
Four parts, each limited to 0–2.375: a = (completions ÷ attempts − 0.3) × 5, b = (yards ÷ attempts − 3) × 0.25, c = touchdowns ÷ attempts × 20, d = 2.375 − interceptions ÷ attempts × 25. Rating = (a + b + c + d) ÷ 6 × 100. 20 of 30 for 250 yards, 2 TD, 1 INT gives 100.7.
What is a perfect passer rating?
158.3, when all four parts reach their maximum of 2.375: at least 77.5 % completions, 12.5 yards per attempt, touchdowns on 11.875 % of attempts and no interceptions.
How is the NCAA rating different?
College football uses passing efficiency: (8.4 × yards + 330 × TD + 100 × completions − 200 × INT) ÷ attempts, with no limits on the parts. The same 20 of 30 for 250 yards, 2 TD, 1 INT is 152 on this scale, so the two numbers cannot be compared.
Is passer rating the same as QBR?
No. QBR is a proprietary metric built from play-by-play data, including runs, sacks and game situation. Passer rating uses only the five numbers of the passing line, so anyone can recompute it.
Can yards be negative?
Yes, a passer can lose yards overall on completed passes. Part b then stays at its minimum of 0.