QBR Calculator — calculate qbr for training and performance. Evidence-based formula and benchmarks.
QBR on this page is a clearly labelled educational approximation, not ESPN's proprietary Total QBR. It is built for American football, with fields and language that match that sport rather than a generic goals-and-shots form. Its purpose is to combine five visible quarterback indicators into a reproducible 0–100 classroom estimate. The result is an auditable descriptive statistic, not an automatic grade of a player, team, coach, tactic, or recruitment decision.
Start with completion rate, passing yards per attempt, touchdown rate, interception rate, and rushing yards. Every value must come from the same sample and statistical definition. Record the provider, competition, player or team, date range, minutes or plays included, and any filters for game state. Sports data often looks interchangeable while hiding different rules for event inclusion, possession, attempts, sacks, pressure, tracking speed, or manpower.
The default line of 25 completions on 38 attempts, 286 yards, two touchdowns, one interception, and 28 rushing yards produces a transparent score whose five ingredients can be inspected separately. Reproduce that structure with your own data before comparing results. Keep the unrounded numerator and denominator, because a displayed decimal cannot show whether the sample is one match, a short split, a season, or a provider estimate. If the source changes its definition, treat the new result as a new series.
The closest companion tools are Football Passer Rating and EPA. They answer adjacent questions rather than replacing this one. Using several compatible measures can reveal whether a result reflects volume, efficiency, territory, tactical choice, or sample noise. Do not combine metrics from different sports merely because their names share “football” or a familiar acronym.
The sound comparison boundary is one transparent educational model, with no comparison to an official proprietary QBR table. If one of those conditions changes, label the comparison as exploratory rather than implying that the difference was caused by performance alone.
Simplified QBR estimate = the average of five capped 0–100 component scores for completion, passing efficiency, touchdowns, turnover avoidance, and rushing
The default line of 25 completions on 38 attempts, 286 yards, two touchdowns, one interception, and 28 rushing yards produces a transparent score whose five ingredients can be inspected separately. Keep full precision during the calculation and round only the displayed result. Rounding each component first can create a small but avoidable difference, especially when a composite formula caps or averages several terms.
ESPN Total QBR incorporates context such as expected points, win probability, opponent, game situation, and allocation of responsibility. Those data and weightings are not reproduced here. The equation can be exact relative to its stated inputs while the underlying observation remains uncertain. A provider may revise event tagging after review, a tracking device may lose coverage, or a scorekeeper may use a rule that another dataset excludes.
Use a denominator that answers the intended question. Per-play, per-attempt, per-possession, per-100-possession, and per-minute rates are not interchangeable. When comparing unequal playing time or volume, preserve both the raw total and the rate so a reader can see whether the difference comes from opportunity or efficiency.
The estimate can help demonstrate how changing efficiency or turnover inputs changes a composite score. It must not be presented as an official QBR or used to reconstruct ESPN's result. Use the number only against runs of this same simplified model. Official QBR values come from a different, proprietary play-level process and are not comparable. Add match state, role, opponent, venue, lineup, score margin, and sample size before describing a tactical or player effect.
A useful workflow separates description from explanation. First state what the metric changed and by how much under the fixed definition. Then inspect video, play-by-play, tracking sequences, or coaching notes to understand why. The number may identify a review point, but it cannot show spacing, decision quality, assignment, fatigue, weather, equipment accuracy, or the action of teammates and opponents by itself.
Look at the distribution, not only the average. A stable season figure can contain very different first-half and second-half patterns, home and away splits, or performance against different opponents. Conversely, a dramatic one-game value may move back toward the longer-run average once more opportunities are included.
Communicate uncertainty plainly. Say “in this tracked sample” instead of implying a permanent skill level. If the figure is an educational approximation, keep that label beside every export or screenshot. Never relabel a transparent simplified model as an official proprietary statistic.
This calculator provides educational sports-analysis guidance only. It is not an official league statistic, proprietary provider metric, scouting grade, medical or workload clearance, betting recommendation, contract valuation, or coaching instruction. Confirm published figures with the governing body or data provider and review consequential sporting, health, or commercial decisions with appropriately qualified professionals.