Passer rating calculator.

Four per-attempt components — completion rate, yards, touchdowns, interceptions — are each scaled and capped at 2.375, summed, divided by six, and multiplied by 100. The caps are why the maximum is exactly 158.3.

158.3. It requires at least a 77.5% completion rate, 12.5 yards per attempt, a touchdown on at least 11.875% of throws, and zero interceptions — all four caps hit at once.

The league average has drifted to the low 90s in the modern passing game. A 100+ season is Pro Bowl form; the all-time single-season record is Aaron Rodgers’ 122.5 in 2011.

No. ESPN’s QBR is a proprietary 0–100 model that folds in rushing, sacks, and situation. Passer rating is the older official NFL formula — this calculator — and it counts only the passing line.

Throw every pass incomplete and the completion and yardage components floor at zero, but with no interceptions the fourth component stays maxed — the formula’s famous quirk: an all-incompletions game rates 39.6.

The four components are easy; the caps are what people get wrong. Each part is clamped between 0 and 2.375, and MEDIAN does that in one step. With completions in C2, attempts D2, yards E2, touchdowns F2 and interceptions G2: =(MEDIAN(0,(C2/D2-0.3)*5,2.375)+MEDIAN(0,(E2/D2-3)*0.25,2.375)+MEDIAN(0,F2/D2*20,2.375)+MEDIAN(0,2.375-G2/D2*25,2.375))/6*100. Leave the clamps out and a big game will report a rating above 158.3, which cannot happen.

The formula has been fixed since the early 1970s, but what it produces has not: a rating that led the NFL in 1975 sits mid-table now, because the passing game itself changed underneath a constant equation.

The rating cannot see sacks, fumbles or anything a quarterback does under pressure. First-team All-Pro selection is a vote by people who watched the games rather than the box score, and the two disagree often enough to be worth reading together.

College is a different equation, not a rescaled one. The NCAA formula weights yards, touchdowns, completions and interceptions directly and has no cap at either end, so college ratings run past 158.3 routinely and cannot be compared with an NFL number.