What Is a Passer Rating Calculator?
The NFL passer rating (sometimes called the "quarterback rating," distinct from ESPN's separate Total QBR) is the league's official formula for summarizing a quarterback's passing efficiency in a single number from 0 to a maximum of 158.3. It blends completion percentage, yards per attempt, touchdown rate and interception rate into one figure.
This calculator uses the exact four-component NFL formula, capping each part between 0 and 2.375 exactly as the league office does, so your result matches what you'd see on an official box score.
How to Read Your Results
NFL Passer Rating
The final 0-158.3 score. Roughly speaking, under 70 is a rough game, 80-90 is average, 90-100 is a good game, and 100+ is an excellent, efficient performance. A perfect 158.3 requires maxing out all four components at once.
Completion %, Yards per Attempt, TD % and Interception %
These are the four raw efficiency inputs that get converted into the a, b, c and d components of the formula. Reviewing them individually shows you which part of a quarterback's game is driving (or hurting) the overall rating.
Real-World Example
A quarterback finishes 20-for-30 for 250 yards, 2 touchdowns and 1 interception.
| Component | Calculation | Capped value |
|---|---|---|
| a (completion) | ((20/30) − 0.3) × 5 | 1.833 |
| b (yards) | ((250/30) − 3) × 0.25 | 1.333 |
| c (touchdowns) | (2/30) × 20 | 1.333 |
| d (interceptions) | 2.375 − ((1/30) × 25) | 1.542 |
Averaging a, b, c and d gives 1.010, multiplied by 100 for a passer rating of roughly 100.7 — a strong, above-average game.
Tips for Using This Calculator
- Each component is capped between 0 and 2.375 — an extremely low interception rate can't push the rating above the maximum on its own.
- Passer rating rewards efficiency, not volume. A quarterback with fewer, more efficient attempts can outscore one who throws for more raw yards.
- It ignores sacks, rushing yards and fumbles — for a fuller picture, look at ESPN's Total QBR alongside this number.
- Compare across a full season, not just one game, to smooth out small-sample noise.
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Last updated: August 2026 · Reviewed by: Simple Calculator Tools Editorial Team