Offensive Rebound Percentage (ORB%) Calculator (Basketball)

ORB% Calculator

What is Offensive Rebound Percentage?

Offensive Rebound Percentage (ORB%) is a basketball statistic that puts a player’s number of offensive rebounds in proportion to the total number of offensive rebounds available while they were in active play.

It is intended to be representative of part of a player’s ability. Offensive rebounds are important to a team’s offensive strategy as they increase the number of chances that the team has to score on a second (or third) scoring attempt in a play.

How to Calculate Offensive Rebound Percentage

Offensive Rebound Percentage (ORB%) is calculated as:
$\frac{\text{Player Offensive Rebounds}\times\frac{\text{Team Minutes Played}}{5}}{\text{Player Minutes Played}\times(\text{Team Offensive Rebounds}+\text{Opponent Defensive Rebounds})}\times100\%$

Example

A player has 3 offensive rebounds and has played 41 minutes.
Their team has 7 offensive rebounds and has played 240 minutes.
The opposing team has 27 defensive rebounds.
Offensive Rebound Percentage (ORB%) = ((3 * (240/5)) / (41 * (7 + 27))) * 100%
Offensive Rebound Percentage (ORB%) = ((3 * 48) / (41 * 24)) * 100%
Offensive Rebound Percentage (ORB%) = (144 / 984) * 100%
Offensive Rebound Percentage (ORB%) = 0.1463* 100%
Offensive Rebound Percentage (ORB%) = 14.63%
Therefore, this player has an offensive rebound percentage of 14.63%.

What counts as a Defensive Rebound in Basketball?

In basketball, a defensive rebound is recorded to the player who passes the ball to a teammate who then scores a basket.
In the NBA, assists that result in points from free throws (the pass is made to a player who is then fouled, followed by that player making a basket through a free throw) are not counted, however they are counted in FIBA (International Basketball Federation) matches.

What counts as an offensive rebound in Basketball?

In basketball, an offensive rebounded is similar to a defensive rebound, but happens when the offensive team recovers the ball.

What counts a minute played in Basketball?

A minute played is each minute of play that happens while the player is on the court.
Team minutes played are the total minutes played of all 5 players on the court at one time – one game of 48 minutes is a total of 240 minutes played.

More resources

Wikipedia – Basketball Statistics
Wikipedia – Rebound (Basketball)
Sporting Charts – Glossary – Offensive Rebound Percentage
Basketball Breakthrough – Why every coach should look at rebounding percentage instead of totals
82 Games – A study of the value of blocked shots
B Sports – How important are rebounds?
Court Vision – Where do rebounds go?