Basketball Efficiency Calculator - TS% & Player Rating

True Shooting percentage is calculated with the formula: TS% = Points / [2 × (Field Goals Attempted + 0.44 × Free Throws Attempted)]. It measures total scoring efficiency by properly weighting 2-pointers, 3-pointers, and free throws into a single percentage.

In the modern NBA and high-level college basketball, the league average TS% hovers around 57.0% to 57.5%. A TS% above 60.0% is considered elite, while a TS% above 64.0% is historically exceptional (typically achieved by elite sharpshooters or high-percentage rim-running big men). Anything below 53.0% is considered inefficient.

FG% (Field Goal Percentage) treats all made baskets equally (a 3-pointer counts the same as a layup) and ignores free throws. eFG% (Effective Field Goal Percentage) gives 3-pointers 1.5× value to account for the extra point, but still omits free throws. TS% (True Shooting Percentage) factors in 2-pointers, 3-pointers, and free throws, providing the most complete measurement of overall scoring efficiency.

The standard NBA Efficiency rating is: EFF = (Points + Rebounds + Assists + Steals + Blocks - Missed Field Goals - Missed Free Throws - Turnovers) / Games Played. A single-game EFF score of 20+ is strong, while 30+ represents an All-Star caliber performance.

In basketball, every possession has an expected point value of approximately 1.10 to 1.15 points. When a player turns the ball over or misses a shot that ends in a defensive rebound, that possession yields zero points and awards transition opportunity to the opponent. Deducting for missed attempts prevents players from inflating their stats through inefficient high-volume chucking.

Because not all free throw attempts consume half a possession. And-ones award a free throw with zero additional possessions consumed, technical fouls award free throws without consuming a team possession, and fouls on 3-point attempts award 3 free throws on one possession. Extensive NBA statistical regression determined that 0.44 free throws per attempt accurately reflects true possession usage.

John Hollinger's PER is pace-adjusted to 48 minutes and normalized against the entire league so that the average player always scores 15.00. Our rating is a transparent, box-score-derived per-game rating that does not require proprietary league-wide defensive and offensive pace constants.

You can use it for both! For a single game, enter the single-game box score and set Games Played to 1. For a full season, enter your season totals (e.g., 500 points, 150 rebounds over 25 games), and the calculator will automatically compute your per-game efficiency and overall season shooting percentages.