Passer Rating vs QBR: What's the Difference?

Passer rating and QBR both try to grade quarterbacks in one number, but they are built on completely different philosophies. Passer rating is the traditional, passing-only formula that runs from 0 to a perfect 158.3 — you can compute it from any box score. ESPN’s Total QBR is a proprietary metric on a 0-to-100 scale that folds in rushing and sacks, adjusts for the opponent, and weights each play by how much it actually mattered to the game. One is a transparent formula; the other is a fuller, context-aware estimate you have to look up.

Knowing which is which keeps you from comparing them as if they were the same thing. A 110 passer rating and a 70 QBR are both good — they just sit on different scales measuring different things.

The core difference at a glance

	Passer rating	Total QBR
Scale	0 to 158.3	0 to 100 (50 = average)
Source	Public NFL formula	Proprietary to ESPN
Inputs	Completions, yards, TDs, INTs, attempts	All of that plus rushing, sacks, penalties
Situation-adjusted?	No — every attempt equal	Yes — weighted by leverage
Opponent-adjusted?	No	Yes
Can you compute it?	Yes, from a box score	No

How passer rating works

Passer rating takes four components — completion percentage, yards per attempt, touchdown rate, and interception rate — caps each between 0 and 2.375, adds them, divides by six, and multiplies by 100. That is the whole thing. Its virtues are transparency and simplicity: anyone with a stat line can reproduce it, and it has decades of history behind it.

Its weaknesses follow from what it ignores. Rushing does not count, so a quarterback who gains 60 yards on the ground gets nothing for it. Sacks do not count. Game situation does not count, so a 40-yard completion when trailing by 30 helps the rating exactly as much as a game-tying score. For the full breakdown of the math, see how passer rating is calculated.

How QBR works

Total QBR was ESPN’s attempt to fix those blind spots. Rather than a fixed box-score formula, it is built on play-by-play data and expected points added — the value each play created relative to expectation. From there it does three things passer rating never does:

• Includes rushing and sacks. Scrambles, designed runs, rushing touchdowns, and sacks taken all count toward the quarterback’s number.
• Adjusts for opponent. Production against a top defense is worth more than the same line against a weak one.
• Weights by leverage (“clutch” weighting). A third-down conversion in a one-score game counts more than a completion in a blowout. Low-leverage stat-padding is discounted.

QBR also tries to split credit — a receiver breaking a short pass for 70 yards does not fully accrue to the quarterback. The trade-off is transparency: because the inputs are proprietary and the model is complex, you cannot reproduce QBR yourself, and reasonable people can argue with how it assigns credit.

When they disagree — and why that is useful

The interesting cases are when the two numbers split. A pocket passer who racks up yards in garbage time can post a gaudy passer rating while QBR shrugs, because that production barely moved the win probability. A mobile quarterback who runs for three first downs and takes no sacks can grade far higher in QBR than his passing-only rating suggests. The gap is not a bug — it tells you how a quarterback produced, not just how much.

The practical rule: use passer rating when you want a quick, transparent, historically comparable read on the passing line. Use QBR when you want a fuller estimate of total contribution that accounts for legs, sacks, and situation.

Which should you trust?

For most fan conversations, read them together. If both are high, the case is settled. If they diverge, dig into why — it usually reveals something real about the quarterback’s game, like heavy garbage-time volume or rushing value the old formula misses.

For the wider analytics that power QBR under the hood, see our explainer on EPA in football, and for the team-level efficiency metric built on similar ideas, DVOA in football. To see which quarterbacks turn these numbers into contracts, the highest-paid NFL players is a who’s-who of the position.

And if you want quarterback value working in your fantasy roster rather than just on a leaderboard, our fantasy football trade calculator weighs total production so a trade holds up on output.

Bottom line: passer rating is the transparent, passing-only 0–158.3 formula; QBR is the proprietary, situation-adjusted 0–100 metric that adds rushing and sacks. Read both, and pay attention when they disagree.