The Tendex system is a basketball mathematical statistical formula that was created by sports writer Dave Heeren,[1] in order to determine the playing efficiency of basketball players.[2][3][4] It is generally accepted as the original weighted advanced stat formula used in the sport of basketball.[5]

## Calculation

The Tendex statistical system has 3 different formulas and is calculated as follows:[6][7]

Standard Tendex Rating: (Tendex raw statistical formula)

```(Points) + (Rebounds) + (Assists) + (Steals) + (Blocks) - (Missed Field Goals) - 0.5 * (Missed Free Throws) - (Turnovers) - (Fouls Committed) / (Minutes Played) / (Game Pace (Possessions Per Game, typically ranges from 60 to 75))
```

Modified Tendex Rating: (Tendex weighted average statistical formula)

```(Points) + (Rebounds) + 1.25 * (Assists) + 1.25 * (Steals) + (Blocks) - 1.25 * (Turnovers) - (Missed Field Goals) - (Missed Free Throws / 2) - (Fouls Committed / 2)  / (Minutes Played) / (Game Pace (Possessions Per Game, typically ranges from 60 to 75))
```
```(Points + Rebounds + Assists + Steals + Blocks + Fouls Drawn) - (Missed Field Goals + Missed Free Throws + Turnovers + Shots Rejected + Fouls Committed)
```