Basketball Game Score Calculator

Basketball Game Score Calculator

Calculate your performance indicator based on game statistics

Basketball Game Score Calculator: A Simple Guide

What is Game Score?

Game Score (GmSc) is a metric created by John Hollinger to measure a player’s performance in a single game. It’s a simplified version of Player Efficiency Rating (PER) but focuses only on box score stats—no team or league adjustments. Basketball Game Score Calculator

  • Higher score = Better performance
  • Average game score: ~10
  • Elite game score: 40+ (rare, e.g., Michael Jordan’s 69-point game: 64.6 GmSc)

Game Score Formula

Game Score=P+0.4⋅FG−0.7⋅FGA−0.4⋅(FTA−FT)+0.7⋅OR+0.3⋅DR+S+0.7⋅A+0.7⋅B−0.4⋅PF−TGame Score=P+0.4⋅FG−0.7⋅FGA−0.4⋅(FTA−FT)+0.7⋅OR+0.3⋅DR+S+0.7⋅A+0.7⋅B−0.4⋅PF−T

Positive Contributions (+)

✅ Points (P) → +1 per pt
✅ Field Goals Made (FG) → +0.4 per FG
✅ Free Throws Made (FT) → +0.4 per FT
✅ Offensive Rebounds (OR) → +0.7 per OR
✅ Defensive Rebounds (DR) → +0.3 per DR
✅ Steals (S) → +1 per steal
✅ Assists (A) → +0.7 per assist
✅ Blocks (B) → +0.7 per block

Negative Contributions (–)

❌ Field Goal Attempts (FGA) → -0.7 per FGA
❌ Missed Free Throws (FTA – FT) → -0.4 per miss
❌ Turnovers (T) → -1 per TO
❌ Personal Fouls (PF) → -0.4 per foul

How to Calculate Game Score (Example)

Player Statline:

  • Points (P): 18
  • FG Made (FG): 7
  • FG Attempts (FGA): 11
  • FT Made (FT): 6
  • FT Attempts (FTA): 17
  • Assists (A): 15
  • Turnovers (T): 3
  • Personal Fouls (PF): 7

Calculation:Game Score=18+(0.4×7)−(0.7×11)−0.4×(17−6)+0.7×15−0.4×7−3=18+2.8−7.7−4.4+10.5−2.8−3=∗∗13.4∗∗Game Score​=18+(0.4×7)−(0.7×11)−0.4×(17−6)+0.7×15−0.4×7−3=18+2.8−7.7−4.4+10.5−2.8−3=∗∗13.4∗∗​

(This is a solid performance—above average!)

Why Use Game Score?

✔ Quickly compare players in a single game.
✔ No advanced stats needed—just box score data.
✔ Great for fantasy basketball & player analysis.

Related Basketball Metrics:

  • Player Efficiency Rating (PER) – Adjusts for pace & league averages.
  • True Shooting % (TS%) – Measures shooting efficiency.
  • Win Shares (WS) – Estimates player contribution to wins.

Would you like a comparison with PER or an NBA player example? 🏀