What is NBA Efficiency (EFF)?

EFF is the league's simple box-score rating: points + rebounds + assists + steals + blocks, minus missed field goals, missed free throws, and turnovers. It rewards all-round production in a single number and is easy to compute from a stat line.

How does EFF differ from Hollinger's PER?

Hollinger's true PER is pace-adjusted and league-normalised so the average is always 15.00, which requires full-league data this tool cannot include. EFF is the raw, unadjusted box-score version, which is why it is the practical choice for a single line.

Why use a per-minute figure?

Total EFF favours players who play more minutes. Dividing by minutes, or scaling to a 36-minute baseline, reveals efficient bench players whose totals are low only because their court time is short.

What counts as a missed shot here?

A missed field goal is field goals attempted minus field goals made; a missed free throw is free throws attempted minus made. Enter attempts and makes, or directly enter misses if that is how your stat sheet reports them.

Is a higher EFF always better?

Generally yes for offensive box-score impact, but EFF ignores defence beyond steals and blocks, and rewards volume scoring. Pair it with True Shooting percentage and net rating for a fuller picture of a player's value.

Basketball Player Efficiency Rating (PER) Calculator

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A single box-score line hides how much a player actually contributed. The NBA’s Efficiency rating compresses scoring, rebounding, playmaking, and defence into one number, and penalises wasted possessions. This calculator computes it correctly and adds a per-minute rate so you can compare players fairly.

How it works

NBA Efficiency sums positive plays and subtracts the negative ones:

EFF = PTS + REB + AST + STL + BLK
      − (FGA − FGM) − (FTA − FTM) − TOV

The missed-shot terms FGA − FGM and FTA − FTM punish inefficient volume scoring. Dividing the total by minutes gives a per-minute rate, and multiplying that by 36 produces the common per-36-minutes figure used to compare players with different roles.

Example and tips

A player with 24 points on 9-of-18 shooting, 8-of-10 free throws, 7 rebounds, 5 assists, 2 steals, 1 block, and 3 turnovers has an EFF of 24 + 7 + 5 + 2 + 1 − 9 − 2 − 3 = 25. Over 30 minutes that is 0.83 per minute, or about 30 per 36 minutes — a strong all-round game. Remember EFF rewards volume, so cross-check a high score against shooting efficiency before drawing conclusions.