Mastering the True Shooting Percentage Formula: A Complete Guide to Basketball Scoring Efficiency Metrics

Evaluating scoring efficiency in basketball requires more than a simple look at field goal percentage. Traditional stats fail to account for the added value of three-point shots and the steady value of free throws. The True Shooting Percentage (TS%) formula was developed to address these limitations, providing a comprehensive measure of a player's efficiency by weighing all types of scoring attempts.

As a foundational metric in modern advanced NBA player stats, TS% offers coaches, analysts, and fans an accurate picture of how effectively a player turns possessions into points. Whether analyzing an MVP candidate or a rotational specialist, understanding TS% is essential for evaluating true offensive impact.

Understanding True Shooting Percentage

True Shooting Percentage measures how efficiently a player scores the basketball per scoring possession. Unlike traditional Field Goal Percentage (FG%), which treats two-pointers and three-pointers identically and ignores free throws entirely, TS% incorporates all scoring methods into a single metric.

The fundamental goal of basketball is to maximize points per possession, not merely to make shots. Because a three-point field goal is worth 50% more than a two-point field goal, a player shooting 33.3% from beyond the arc generates the same point value per shot as a player shooting 50% on two-pointers. Similarly, free throws represent valuable, high-efficiency scoring opportunities.

To understand where TS% fits among other basketball scoring efficiency metrics, consider how key stats evaluate performance:

The True Shooting Percentage Formula Explained

The formula for calculating True Shooting Percentage relates total points scored directly to total estimated scoring possessions:

TS% = PTS / (2 * (FGA + (0.44 * FTA)))

Here is a breakdown of each variable:

PTS (Total Points): The total number of points a player scores from 1-point free throws, 2-point field goals, and 3-point field goals.

FGA (Field Goal Attempts): Total two-point and three-point shot attempts.

FTA (Free Throw Attempts): Total free throw attempts.

0.44 (The Free Throw Coefficient): This coefficient accounts for possession usage. On average, 0.44 of all free-throw attempts use a distinct scoring possession. This factor adjusts for "and-one" plays (where a player makes a field goal and draws a foul, using only one possession for both) and technical foul free throws (which do not consume a standard offensive possession).

The denominator calculates total "scoring possessions." Dividing total points by two times total scoring possessions yields points per possession expressed as a percentage.

TS% vs. Effective Field Goal Percentage (eFG%)

While traditional FG% is flawed, Effective Field Goal Percentage (eFG%) offers a partial solution by adjusting for three-pointers using the formula:

eFG% = (FGM + (0.5 * 3PM)) / FGA

However, eFG% leaves out free throws entirely. This creates a blind spot when evaluating players who excel at drawing fouls and converting at the line.

Consider a comparison between two modern scoring profiles over a 20-shot sample:

In this scenario, eFG% captures Player A's three-point value, while TS% properly measures Player B's total points generated across all scoring possessions, including free throws.

Evaluating Player Efficiency: Benchmarks and Context

Interpreting TS% requires context relative to era and league trends. According to historical tracking on Basketball-Reference, the modern NBA league-average TS% hovers around 57% to 58%, driven by increased three-point volume and improved spacing.

Elite (62%+): Exceptional efficiency reserved for high-volume superstars with elite three-point and free-throw profiles (e.g., Stephen Curry, Shai Gilgeous-Alexander) or dominant interior finishers with high field-goal margins (e.g., Nikola Jokić).

Above Average (58%–61%): Highly efficient scorers who reliably maximize offensive possessions.

Average (55%–57%): League-average efficiency. Acceptable production that keeps an offense on schedule.

Below Average (Under 54%): Inefficient scoring. High-volume shooters in this range often diminish their team's overall scoring output.

Linking TS% to Offensive Rating Calculations

While TS% measures individual shot-finishing efficiency, an offensive rating calculation evaluates total offensive output per 100 possessions by incorporating turnovers and offensive rebounds. A player can maintain a high TS%, but if they turn the ball over frequently, their overall individual Offensive Rating will drop. Conversely, combining a 60%+ TS% with a low turnover rate results in an elite Offensive Rating.

Usage Rate and Tactical Application

True Shooting Percentage should always be evaluated alongside Usage Rate (USG%). Maintaining an elite 62% TS% while taking 30% of a team's shots (high usage) is significantly more difficult than maintaining that same efficiency on an 11% usage rate as a spot-up option.

By accounting for three-pointers, free throws, and possession usage, the True Shooting Percentage formula stands as the primary standard for evaluating scoring value in modern basketball analytics.

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