What is NFL passer rating?
Passer rating is the NFL's official quarterback efficiency metric, in use since 1973. It blends four rate stats — completion percentage, yards per attempt, touchdown rate and interception rate — into one number on a 0 to 158.3 scale. The maximum, 158.3, requires at least 77.5% completions, 12.5 yards per attempt, an 11.9% touchdown rate and no picks.
How the calculator works
The league formula scores each component on a 0–2.375 band: a = ((comp/att) − 0.3) × 5, b = ((yards/att) − 3) × 0.25, c = (TD/att) × 20, d = 2.375 − (INT/att) × 25, each clamped to [0, 2.375]. Rating = (a+b+c+d)/6 × 100. The clamps are why terrible performances bottom out at 0 and great ones cap at 158.3.
Common use cases
- Grading a fantasy QB's efficiency beyond fantasy points
- Comparing quarterbacks across eras on the same scale
- Checking how one interception swings a rating — it is brutal
Context for the number
90+ is a good season, 100+ is excellent, and career leaders like Aaron Rodgers sit around 103. Because sack data is excluded, modern analysts supplement it with EPA and CPOE — but passer rating remains the number on the back of every trading card.
Frequently Asked Questions
Why is the maximum 158.3?
Each of the four components caps at 2.375; (4 × 2.375) ÷ 6 × 100 = 158.33.
Does passer rating include rushing or sacks?
No — it is passing only, which is why dual-threat QBs look better in EPA and total QBR.
What is a bad passer rating?
Under 70 is a poor game; under 50 is a disaster (the 0 floor exists for a reason).
Privacy & Your Data
StatPlay runs entirely in your browser. The numbers you enter never leave your device — there is no server, no account and no upload. We store only a single local preference flag when you dismiss the cookie notice.