Last updated: 4 October 2026
Reviewed by Jordan Morley, FA Level 2 Football Coach
Efficiency rating
Efficiency (EFF)
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Frequently asked questions
Is EFF the same as PER?
No. EFF is a simple raw sum from the box score. PER (Player Efficiency Rating) is a more complex, pace- and minutes-adjusted metric. EFF is easier to calculate by hand and good for single games.
Is EFF a reliable stat for comparing players at different positions?
EFF tends to favor high-volume stat accumulators like rebounders and scorers, so it can undervalue role players who contribute through defence, spacing, or playmaking in ways that don't show up as cleanly in the box score — it's best used alongside other metrics rather than as a standalone ranking.