Offensive Rating Calculator
Free Offensive rating Calculator for basketball. Enter your stats to get performance metrics and improvement targets.
Formula
ORtg = (Points Produced / Possessions Used) x 100
Offensive rating estimates how many points a player generates per 100 possessions used. Possessions used equals field goal attempts plus 0.44 times free throw attempts plus turnovers minus offensive rebounds. Points produced includes field goals, free throws, and assist contributions.
Worked Examples
Example 1: Star Point Guard Performance
Problem: A point guard plays 34 minutes and records: 25 points, 10/18 FG, 5/6 FT, 2 ORB, 5 assists, 3 turnovers. Team has 95 possessions in 240 total minutes.
Solution: Player possessions = 18 + 0.44(6) + 3 - 2 = 21.64\nPoints produced = 10(2) + 5 + 5(0.5) = 27.5\nOffensive rating = (27.5 / 21.64) x 100 = 127.1\nTrue shooting: TSA = 18 + 0.44(6) = 20.64, TS% = 25 / (2 x 20.64) = 60.6%\nUsage rate = (21.64 x 48) / (34 x 95) x 100 = 32.2%
Result: ORtg: 127.1 (Elite) | TS%: 60.6% | Usage: 32.2% | Outstanding efficiency at high usage
Example 2: Role Player Evaluation
Problem: A role player plays 22 minutes: 8 points, 3/6 FG, 2/2 FT, 1 ORB, 1 assist, 1 turnover. Team: 100 possessions, 240 minutes.
Solution: Player possessions = 6 + 0.44(2) + 1 - 1 = 6.88\nPoints produced = 3(2) + 2 + 1(0.5) = 8.5\nOffensive rating = (8.5 / 6.88) x 100 = 123.5\nTrue shooting: TSA = 6 + 0.44(2) = 6.88, TS% = 8 / (2 x 6.88) = 58.1%\nUsage rate = (6.88 x 48) / (22 x 100) x 100 = 15.0%
Result: ORtg: 123.5 (Excellent) | TS%: 58.1% | Usage: 15.0% | Efficient in limited role
Frequently Asked Questions
What is offensive rating in basketball and how is it calculated?
Offensive rating (ORtg) is an advanced basketball statistic that estimates the number of points a player or team produces per 100 possessions. For teams, it is simply calculated as (points scored / possessions) times 100. For individual players, the calculation is more complex, originally developed by Dean Oliver in his book Basketball on Paper. It considers field goals made, free throws made, assists, turnovers, offensive rebounds, and various team factors. The formula estimates how many points a player produces through their own shooting and their assists, then divides by the possessions they used. An average NBA offensive rating is around 105 to 110 points per 100 possessions. Top players like elite scorers and playmakers routinely exceed 115 to 120 offensive rating.
What is a good offensive rating in the NBA?
NBA offensive ratings have trended upward over time with rule changes favoring offense. In the modern NBA, an average team offensive rating is about 110 to 112 points per 100 possessions. Top-tier offenses rate above 115, while the best offenses in history have exceeded 118. For individual players, ratings above 115 are considered very good, above 120 are excellent, and above 125 are elite. However, individual offensive rating must be considered alongside usage rate. A player who rarely touches the ball might have a high offensive rating but low impact. Players like Stephen Curry, Nikola Jokic, and Kevin Durant consistently post offensive ratings above 120 due to their exceptional scoring efficiency and playmaking. Role players who take mostly open shots can also have high ratings despite lower overall impact.
How does usage rate relate to offensive rating?
Usage rate estimates the percentage of team possessions a player uses while on the court, through shot attempts, free throw attempts, or turnovers. The formula is Usage Rate = (FGA + 0.44 x FTA + TOV) x (Team Minutes / 5) / (Minutes Played x Team Possessions) x 100. Average usage is about 20 percent since five players share the court equally. Star players typically have usage rates of 25 to 35 percent. Usage and offensive rating have an important inverse relationship. As usage increases, maintaining a high offensive rating becomes exponentially harder because a player faces more difficult shots, tighter defense, and must create more for themselves. A player with 120 offensive rating at 30 percent usage is far more valuable than one with 120 at 15 percent usage. This tradeoff is a crucial insight for evaluating players.
What is the difference between offensive rating and points per game?
Points per game is a raw counting stat that does not account for pace, efficiency, or playing time, making it misleading for comparisons. A player averaging 20 points on a fast-paced team using many possessions is less efficient than one averaging 20 points on a slower team. Offensive rating normalizes production to per-100-possession terms, removing pace as a variable. It also incorporates efficiency by accounting for missed shots (which use possessions without scoring) and turnovers (which waste possessions entirely). A player scoring 15 points per game with high efficiency might have a better offensive rating than a 25-point scorer with poor shot selection and turnovers. Offensive rating better predicts team success and is the preferred measure for advanced analysis, though it does have limitations with sample size and lineup context.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
Is Offensive Rating Calculator free to use?
Yes, completely free with no sign-up required. All calculators on NovaCalculator are free to use without registration, subscription, or payment.