NFL Passer Rating Calculator
Compute an NFL quarterback passer rating from completions, attempts, yards, touchdowns and interceptions — on the official 0 to 158.3 scale.
How it works
a=((comp/att−.3)×5) · b=((yds/att−3)×.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 NFL passer rating scores four things — completion percentage, yards per attempt, touchdown rate and interception rate — each on a 0 to 2.375 sub-scale, then averages them onto a 0 to 158.3 range. The clamps are what create the odd 158.3 maximum: once a component maxes out, doing even better on it adds nothing. It rewards efficiency over volume, which is why a clean, high-percentage game can outrate a high-yardage one full of picks.
Worked example
20/30 for 250 yards, 2 TD, 1 INT: a = (0.667−0.3)×5 = 1.833; b = (8.333−3)×0.25 = 1.333; c = (0.0667)×20 = 1.333; d = 2.375 − (0.0333)×25 = 1.542. Sum 6.042, ÷6 = 1.007, ×100 = 100.7 — an excellent single-game rating.
Frequently asked questions
Why is the maximum 158.3 and not 100?
Because each of the four components is capped at 2.375. Four maxed components average to 2.375, and 2.375 ÷ 6 × 100 × 6 works out to (2.375/6)×100 per part — summing to 158.3. The caps prevent one freak stat from dominating.
What is a perfect passer rating?
A rating of 158.3, reached when all four components hit their 2.375 cap — very high completion percentage, big yards per attempt, a high touchdown rate and zero interceptions in the same game.
How is this different from the NFL’s newer QBR?
Passer rating uses only five box-score numbers and ignores context. ESPN’s Total QBR adds down-and-distance, sacks, rushing and game situation on a 0–100 scale. This calculator computes the classic passer rating.
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Estimates for general fitness and education — individual results vary with terrain, fitness, technique and measurement error. Not medical advice.