Sports
Basketball Performance Calculator
Turn a basketball box score into shooting efficiency, possessions, offensive rating, pace, scoring mix, and possession-quality diagnostics.
Possession efficiency
Rebuild the scoring line from shot outcomes
Made and attempted shots drive points, shooting efficiency, estimated possessions, offensive rating, and pace.Half-court decision view
Shot value and possession-cost map
Detailed calculation process
Calculate attempts first, then normalize by possessions
General formulas
Points
PTS = 2(2PM) + 3(3PM) + FTMField-goal attempts
FGA = 2PA + 3PAEffective FG%
eFG% = (FGM + 0.5 × 3PM) / FGA × 100True shooting%
TS% = PTS / [2(FGA + 0.44 × FTA)] × 100Estimated possessions
Poss = FGA + 0.44 × FTA − OREB + TOVOffensive rating
ORtg = PTS / Poss × 10048-minute pace
Pace = Poss × 48 / MSymbols and units
2PM / 2PA made / attempted two-point field goals (shots)3PM / 3PA made / attempted three-point field goals (shots) FTM / FTA made / attempted free throws (shots)OREB offensive rebounds (possessions extended) TOV turnovers (possessions ended)M game minutes represented (min)
Worked substitution with the current box score
Outcome ledger
How each event contributes
| Event | Made / count | Attempts | Points | Possession effect |
|---|
Practical examples
Questions this line can answer
- Compare two team games after scaling both to 100 estimated possessions.
- Separate a hot three-point night from overall shot volume.
- Identify whether turnovers erased the value gained from offensive rebounds.
Common errors
Keep the box score internally valid
- Made shots cannot exceed attempts.
- Team minutes must match the segment being analyzed.
- The 0.44 coefficient estimates multi-shot and technical free-throw possessions; it is not exact play-by-play possession counting.
Limitations and interpretation
This calculator evaluates an entered scoring line, not defense, lineup context, shot quality, opponent strength, or win probability. Estimated possessions can differ from audited play-by-play possessions. Offensive rating describes scoring efficiency for this sample and should not be treated as a player rating.
Basketball performance FAQ
Why does eFG% give extra credit to three-pointers?
A made three produces 50% more points than a made two, so the numerator adds half a make for each three.
Why can true shooting differ from eFG%?
True shooting includes scoring and attempts at the free-throw line; eFG% uses field goals only.
Is pace the same as possessions?
No. Pace normalizes estimated possessions to a 48-minute game, while possessions is the estimate for the minutes entered.