The Metric of Responsibility
In basketball, not all stars are created equal. Some players stand in the corner waiting for a pass, while others dominate the ball on every single possession.
Usage Rate (USG%) is the defining metric for offensive responsibility. It calculates the exact percentage of a team's offensive plays that a specific player "ends" while they are on the floor. A play is "ended" when the player shoots the ball, goes to the free-throw line, or commits a turnover.
Understanding Offensive Load
Usage rate is the ultimate context metric. If a player is scoring 25 points per game but has an astronomical 40% Usage Rate, they might actually be hurting the team by refusing to pass. Conversely, a highly efficient scorer with a low Usage Rate is often a massive positive asset.
The Formula
To find the USG%, we compare the possessions ended by the player against the total possessions used by the team. We use the 0.44 multiplier to estimate possessions used by free throws.
USG% = 100 * ((FGA + 0.44 * FTA + TO) / (Team FGA + 0.44 * Team FTA + Team TO))
Interpreting Usage
- 15% - 19%: Role players and defensive specialists.
- 20% - 24%: Secondary scoring options and average starters.
- 25% - 29%: Primary offensive weapons and All-Stars.
- 30%+: Franchise superstars carrying a massive "heliocentric" offensive load.