Basketball PER Calculator

It's an explicit simplification, not a match. This calculator only weights points, rebounds, assists, steals, blocks, missed shots, and turnovers — it doesn't apply Hollinger's pace adjustment, personal-foul term, team assist ratio, or the league-wide normalization to a 15.00 average that the real formula uses. Treat the result as directionally useful but not a substitute for the published stat.

Dividing the net positive-minus-negative contribution total by minutes played converts a season's raw totals into a per-minute rate, and multiplying by 48 (an NBA regulation game's length) scales that rate back up to a per-48-minutes figure. That normalization is what lets a player who logs 20 minutes a game be compared fairly against one who logs 35, since both are expressed on the same full-game basis.

Missed field goals and missed free throws are subtracted at fixed weights (0.7 and 0.4) regardless of shot difficulty, and turnovers are subtracted at full weight. A player who takes a lot of contested, high-difficulty shots will rack up more misses in absolute terms than a low-usage player who mostly takes easy looks, so the formula can penalize ball-dominant scorers even when their overall team value is comparable.

They're the same relative weighting Hollinger's original PER concept uses to reflect that a rebound is worth less on its own than a point but more than an assist, based on how much each stat typically contributes to winning. This calculator keeps those relative weights (rebounds 0.7, assists 0.3, steals 1.0, blocks 0.7) but drops the pace and league normalization steps that the full formula layers on top.

Only partially. Steals and blocks are the only defensive stats in the formula, so on-ball defense, help rotations, contested shots that don't result in a block, and positional discipline never show up in the score at all. A player who is an elite individual defender but doesn't rack up steals or blocks can post a modest PER despite real defensive value, while a poor defender who accumulates steals and blocks in a gambling, high-risk defensive style can score well. Read PER alongside shooting efficiency and usage rate, not as a standalone measure of a player's total contribution.