Sports & Gaming · Statistics · Descriptive Statistics
Quarterback Total QBR Simplified Calculator
Estimates a quarterback's ESPN Total QBR (0–100 scale) from key performance stats using a simplified composite model.
Calculator
Formula
Y_adj = passing yards + rushing yards; TD = total touchdowns; INT = interceptions; CMP_pct = completion percentage (0–100). The composite score is shifted to a 0–100 scale and clamped at the bounds. This is a publicly documented simplified approximation of ESPN's proprietary Total QBR metric.
Source: ESPN Total QBR methodology overview (Oliver, Dean. ESPN Stats & Information, 2011). Simplified approximation for educational use.
How it works
ESPN's proprietary Total QBR accounts for dozens of play-level variables including Expected Points Added (EPA), pressure context, and opponent adjustments. This simplified version distills the most predictive factors — adjusted yards (passing + rushing minus sack losses), total touchdowns, interceptions, and completion percentage — into a single composite score anchored at 50 for an average game performance.
The formula applies weighted bonuses for touchdowns (+20 per TD) and weighted penalties for interceptions (−45 per INT), reflects yardage volume, and rewards higher completion rates. The raw composite is scaled by dividing by 50 and shifted so that a league-average game produces a QBR near 50. The result is clamped between 0 and 100 to match the official scale.
Total QBR was developed by ESPN statistician Dean Oliver and debuted in 2011. Unlike the traditional NFL Passer Rating (scale 0–158.3), Total QBR includes rushing contributions, accounts for game context, and uses a more intuitive 0–100 scale where 50 represents an average starter. It is widely used by analysts, fantasy sports enthusiasts, and coaches for quick performance benchmarking.
Worked example
Suppose a quarterback posts the following line: 28/40 completions, 310 passing yards, 30 rushing yards, 2 passing TDs, 0 rushing TDs, 1 interception, sacked twice for 14 yards.
Step 1 — Completion Percentage: 28 ÷ 40 × 100 = 70.0%
Step 2 — Adjusted Yards: 310 + 30 − 14 = 326 yards
Step 3 — Total TDs: 2 + 0 = 2 TDs
Step 4 — Apply the formula:
Raw = 50 + (326 + 20×2 − 45×1 + 10×70 − 500) / 50
= 50 + (326 + 40 − 45 + 700 − 500) / 50
= 50 + 521 / 50
= 50 + 10.42 = 60.4
Result: Estimated Total QBR ≈ 60.4, a solid above-average performance indicative of a QB who managed the game well with good yardage and multiple TDs offset by one turnover.
Limitations & notes
This calculator is a simplified educational approximation. ESPN's official Total QBR is computed from play-by-play Expected Points Added (EPA) data, incorporating down-and-distance context, game situation (score, time remaining), pass pressure, opponent strength, and credit/debit splits between the QB and receivers (e.g., dropped passes, yards after catch). None of those situational factors are captured here. Results will differ from official ESPN QBR values, particularly for QBs who excel or struggle primarily in high-leverage or unusual game situations. Additionally, the model assumes a single-game scope; season-long QBR aggregation involves further weighting by snap count and opponent quality. This tool should not be used for official record-keeping, scouting reports, or contract evaluations.
Frequently asked questions
What is ESPN Total QBR and how is it different from NFL Passer Rating?
ESPN Total QBR is a 0–100 scale metric where 50 is average and higher is better. The traditional NFL Passer Rating uses a 0–158.3 scale, ignores rushing, and weights only completions, yards, TDs, and interceptions in a formula with artificial caps. Total QBR includes rushing yardage and TDs, accounts for game context and opponent quality, and uses Expected Points Added at the play level, making it a more complete measure of a QB's contribution.
Why does this calculator give a different result than ESPN's official QBR?
ESPN's official Total QBR is computed from proprietary play-by-play data including EPA, pressure situations, opponent adjustments, and receiver contribution splits. This calculator uses only box score statistics — the publicly available, aggregated numbers — as a simplified approximation. For educational and illustrative purposes it performs well, but it cannot replicate the situational nuance of the full model.
What is considered a 'good' Total QBR for a single game?
A QBR of 50 represents a perfectly average performance. Scores above 70 indicate a strong game, above 80 indicate an elite performance, and scores above 90 are rare and typically occur only in dominant multi-TD outings with no turnovers. Scores below 30 indicate a poor game, and below 20 often correspond to turnover-heavy or very low-yardage outings.
Why are interceptions penalized more heavily than touchdowns are rewarded?
In expected-points terms, throwing an interception costs a team roughly 4–5 expected points (surrendering field position and possession), whereas a touchdown pass adds approximately 6–7 expected points. However, the relative swing in game win probability from a turnover is historically larger than a single TD gain, which is why interceptions carry a heavier penalty coefficient (−45) compared to the TD bonus (+20) in this simplified model.
Does this calculator account for sacks?
Yes. Sack yards lost are subtracted from passing and rushing yards to produce an 'Adjusted Total Yards' figure. This reflects the real cost of sacks to a QB's yardage efficiency. The number of sacks themselves also serves as context when interpreting the result — a high sack count often signals either a struggling offensive line or poor pocket mobility, factors that full EPA-based QBR models weight appropriately.
Can I use this calculator for college football quarterbacks?
Yes, the formula is not NFL-specific and can be applied to any level of football that tracks the same box score statistics. However, note that calibration benchmarks differ: a QBR of 50 in the NFL corresponds to an average starter, but the same raw stats in college football (where defenses vary more widely) may represent a different tier of play. Interpret results relative to the appropriate peer group.
How are rushing touchdowns included in the calculation?
Rushing touchdowns are added to passing touchdowns to compute a 'Total TDs' figure before applying the TD bonus coefficient. This ensures that a QB who scores on a scramble receives appropriate credit, consistent with ESPN Total QBR's design philosophy of evaluating the quarterback as a complete contributor — not just a passer.
Last updated: 2025-01-30 · Formula verified against primary sources.