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Q: What is PER in basketball?

Player Efficiency Rating (PER) is a per-minute rating that summarizes all of a player's positive and negative contributions. League average is 15.0.

Q: How are Win Shares calculated?

Win Shares estimate the number of wins a player produces through offensive and defensive contributions, relative to a replacement-level player.

Your comprehensive guide to understanding every basketball metric. From traditional box score stats to cutting-edge impact metrics, with formulas, real player examples, and practical applications.

Stat Calculator Compare Players Advanced Stats Stat Trends

Traditional Stats Efficiency Metrics Impact Metrics Win Metrics Shot Quality Lineup Data Pace & Possession

Traditional Stats

PPG, RPG, APG, SPG, BPG

Definition

Per-game averages directly from the box score: points, rebounds, assists, steals, and blocks per game. The most commonly cited basketball statistics.

Formulas

PPG = Total Points / Games PlayedRPG = Total Rebounds / Games Played

Example

Joel Embiid (PHI) leads with 34.7 PPG, 11 RPG, and 5.6 APG. These numbers immediately convey his dominance but do not tell us how efficiently he scores.

Limitations

Traditional stats do not account for efficiency, pace, or minutes played. A player with 25 PPG on 50% shooting is more valuable than one with 25 PPG on 40% shooting.

When to Use

Quick comparisons and fantasy basketball. For deeper analysis, pair with efficiency metrics.

Efficiency Metrics

TS%, eFG%, FG%

Definition

True Shooting Percentage (TS%) measures scoring efficiency by accounting for 2-pointers, 3-pointers, and free throws. Effective Field Goal Percentage (eFG%) adjusts FG% by weighting three-pointers 50% more.

Formulas

TS% = PTS / (2 × (FGA + 0.44 × FTA))eFG% = (FGM + 0.5 × 3PM) / FGA

Example

Giannis Antetokounmpo (MIL) shoots 61.1% from the field, but his TS% is reduced by poor free throw shooting (65.7%). Compare to Stephen Curry who shoots only 45% but has elite TS% thanks to high 3P% (40.8%) and FT% (92.3%).

Limitations

TS% can be skewed by very low volume. A player who takes 2 shots and makes both has 100% TS% but that tells us little.

When to Use

Comparing scorers across different play styles. Essential for evaluating whether a high scorer is efficient or just high-volume.

Impact Metrics

PER, BPM, VORP

Definition

PER (Player Efficiency Rating) summarizes all box score contributions into a single per-minute rating. League average is 15.0. BPM (Box Plus/Minus) estimates a player's contribution per 100 possessions relative to league average. VORP (Value Over Replacement Player) converts BPM into a cumulative season value.

Formulas

PER = complex formula using all box score stats, normalized to 15.0 league averageVORP = (BPM - (-2.0)) × (% of possessions played) × (team games / 82)

Example

Nikola Jokic (DEN) consistently leads the league in PER and BPM because his 26.4/12.4/9 stat line with 58.3% FG reflects elite contributions across every dimension.

Limitations

PER overvalues scoring and undervalues defense. BPM is better for defense but still box-score dependent.

When to Use

MVP debates, comparing players across eras, and quantifying total impact. PER for per-minute production; VORP for cumulative season value.

Win Metrics

Win Shares, RAPTOR, EPM

Definition

Win Shares estimate the number of wins a player produces for their team. RAPTOR (FiveThirtyEight) and EPM (Estimated Plus-Minus) use player tracking data combined with box score stats to measure total impact on winning.

Formulas

Win Shares = Offensive WS + Defensive WSOWS = Marginal Offense / Marginal Points per Win

Example

Shai Gilgeous-Alexander (OKC) posts high Win Shares thanks to elite scoring efficiency (53.5% FG) combined with defensive contributions (2 STL, 0.9 BLK) on a top-seeded team.

Limitations

Win Shares are team-dependent: a great player on a bad team produces fewer Win Shares than the same player on a good team.

When to Use

Attributing team wins to individual players. Great for comparing players on teams with different records.

Shot Quality

Expected vs Actual, Shot Selection

Definition

Shot quality metrics compare a player's actual shooting percentage to the expected percentage based on shot location, defender distance, and shot type. The difference reveals true shot-making ability.

Formula

Shot Quality Delta = Actual FG% - Expected FG% (based on shot location/context)

Example

Stephen Curry (GSW) takes many of the most difficult shots in the NBA (deep threes, contested pull-ups) yet maintains 40.8% from three. His shot quality delta is among the highest in history. Visit Shot Charts for visual data.

Limitations

Requires tracking data not always publicly available. Small sample sizes for specific shot types can be misleading.

When to Use

Evaluating shooters, identifying regression candidates, and analyzing team offensive systems.

Lineup Data

5-Man Combinations, Net Rating

Definition

Lineup data analyzes how specific 5-player combinations perform together. Net Rating (offensive rating minus defensive rating) per 100 possessions reveals which combinations help or hurt a team.

Formula

Net Rating = Offensive Rating - Defensive Rating (per 100 possessions)

Example

The Denver Nuggets starting lineup with Nikola Jokic at center consistently posts the best net rating in the league. Check our Lineups page for detailed data.

Limitations

Small sample sizes for rare lineups. A 5-man group that played 10 minutes together is not statistically reliable.

When to Use

Evaluating rotation decisions, identifying which player combinations maximize performance, and building optimal fantasy daily lineups.

Pace & Possession

Pace Factor, Per-100 Stats

Definition

Pace measures the number of possessions a team uses per 48 minutes. Per-100-possession stats normalize box score numbers so you can fairly compare players on fast-paced vs slow-paced teams.

Formula

Pace = 48 × ((Poss + Opp Poss) / (2 × (MP / 5)))

Example

Tyrese Haliburton (IND) plays on one of the fastest-paced teams in the NBA. His 10.9 APG is partly inflated by pace. Per-100-possession stats help reveal whether his passing is truly elite or amplified by more opportunities.

Limitations

Pace adjustment alone does not account for quality of competition, garbage time, or blowout effects.

When to Use

Any cross-team comparison. Always adjust for pace when comparing players from different systems. Essential for fantasy projections when a player changes teams.

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Getting Started with Basketball Analytics

Basketball analytics has evolved from simple box scores to sophisticated predictive models. Whether you are a data science creator making YouTube content, a fantasy manager, or a basketball coach, understanding these metrics gives you a significant edge.

Start with efficiency metrics like True Shooting Percentage (TS%). These immediately separate efficient scorers from volume scorers. A player like Giannis Antetokounmpo has elite FG% (61.1%) but his true efficiency is reduced by poor free throw shooting (65.7%).

Next, explore impact metrics. PER and BPM answer the question "how much does this player help?" while Win Shares answer "how many wins did they produce?" Nikola Jokic consistently tops these metrics because his game transcends traditional positions with elite passing (9 APG for a center), scoring (26.4 PPG), and rebounding (12.4 RPG).

For YouTube content creation, the most engaging analytics topics are player comparisons using advanced stats, trend analysis over time, and debunking common misconceptions with data. Our Trends page provides auto-generated insights that serve as excellent video topics.

Frequently Asked Questions

What is True Shooting Percentage (TS%)?

TS% measures scoring efficiency by accounting for field goals, three-pointers, and free throws in a single number. The formula is PTS / (2 x (FGA + 0.44 x FTA)). League average is typically around 57%. It is the single best measure of scoring efficiency.

What is PER in basketball?

Player Efficiency Rating (PER) is a per-minute rating developed by John Hollinger that summarizes all of a player's positive and negative contributions. League average is always 15.0. Values above 20 indicate an All-Star caliber player; above 25 indicates MVP-level performance.

How are Win Shares calculated?

Win Shares estimate the number of wins a player produces for their team through offensive and defensive contributions. They are calculated by splitting offensive and defensive production, measuring marginal production above replacement level, and converting to wins using league averages.

Home/Analytics

Basketball Analytics Academy

Your comprehensive guide to understanding every basketball metric. From traditional box score stats to cutting-edge impact metrics, with formulas, real player examples, and practical applications.

Stat Calculator Compare Players Advanced Stats Stat Trends

Traditional Stats Efficiency Metrics Impact Metrics Win Metrics Shot Quality Lineup Data Pace & Possession

Traditional Stats

PPG, RPG, APG, SPG, BPG

Definition

Per-game averages directly from the box score: points, rebounds, assists, steals, and blocks per game. The most commonly cited basketball statistics.

Formulas

PPG = Total Points / Games PlayedRPG = Total Rebounds / Games Played

Example

Joel Embiid (PHI) leads with 34.7 PPG, 11 RPG, and 5.6 APG. These numbers immediately convey his dominance but do not tell us how efficiently he scores.

Limitations

Traditional stats do not account for efficiency, pace, or minutes played. A player with 25 PPG on 50% shooting is more valuable than one with 25 PPG on 40% shooting.

When to Use

Quick comparisons and fantasy basketball. For deeper analysis, pair with efficiency metrics.

Efficiency Metrics

TS%, eFG%, FG%

Definition

Formulas

TS% = PTS / (2 × (FGA + 0.44 × FTA))eFG% = (FGM + 0.5 × 3PM) / FGA

Example

Limitations

TS% can be skewed by very low volume. A player who takes 2 shots and makes both has 100% TS% but that tells us little.

When to Use

Comparing scorers across different play styles. Essential for evaluating whether a high scorer is efficient or just high-volume.

Impact Metrics

PER, BPM, VORP

Definition

Formulas

PER = complex formula using all box score stats, normalized to 15.0 league averageVORP = (BPM - (-2.0)) × (% of possessions played) × (team games / 82)

Example

Nikola Jokic (DEN) consistently leads the league in PER and BPM because his 26.4/12.4/9 stat line with 58.3% FG reflects elite contributions across every dimension.

Limitations

PER overvalues scoring and undervalues defense. BPM is better for defense but still box-score dependent.

When to Use

MVP debates, comparing players across eras, and quantifying total impact. PER for per-minute production; VORP for cumulative season value.

Win Metrics

Win Shares, RAPTOR, EPM

Definition

Formulas

Win Shares = Offensive WS + Defensive WSOWS = Marginal Offense / Marginal Points per Win

Example

Shai Gilgeous-Alexander (OKC) posts high Win Shares thanks to elite scoring efficiency (53.5% FG) combined with defensive contributions (2 STL, 0.9 BLK) on a top-seeded team.

Limitations

Win Shares are team-dependent: a great player on a bad team produces fewer Win Shares than the same player on a good team.

When to Use

Attributing team wins to individual players. Great for comparing players on teams with different records.

Shot Quality

Expected vs Actual, Shot Selection

Definition

Formula

Shot Quality Delta = Actual FG% - Expected FG% (based on shot location/context)

Example

Limitations

Requires tracking data not always publicly available. Small sample sizes for specific shot types can be misleading.

When to Use

Evaluating shooters, identifying regression candidates, and analyzing team offensive systems.

Lineup Data

5-Man Combinations, Net Rating

Definition

Lineup data analyzes how specific 5-player combinations perform together. Net Rating (offensive rating minus defensive rating) per 100 possessions reveals which combinations help or hurt a team.

Formula

Net Rating = Offensive Rating - Defensive Rating (per 100 possessions)

Example

The Denver Nuggets starting lineup with Nikola Jokic at center consistently posts the best net rating in the league. Check our Lineups page for detailed data.

Limitations

Small sample sizes for rare lineups. A 5-man group that played 10 minutes together is not statistically reliable.

When to Use

Evaluating rotation decisions, identifying which player combinations maximize performance, and building optimal fantasy daily lineups.

Pace & Possession

Pace Factor, Per-100 Stats

Definition

Pace measures the number of possessions a team uses per 48 minutes. Per-100-possession stats normalize box score numbers so you can fairly compare players on fast-paced vs slow-paced teams.

Formula

Pace = 48 × ((Poss + Opp Poss) / (2 × (MP / 5)))

Example

Limitations

Pace adjustment alone does not account for quality of competition, garbage time, or blowout effects.

When to Use

Any cross-team comparison. Always adjust for pace when comparing players from different systems. Essential for fantasy projections when a player changes teams.

Getting Started with Basketball Analytics

Frequently Asked Questions

What is True Shooting Percentage (TS%)?

What is PER in basketball?

How are Win Shares calculated?