The Rating Percentage Index (RPI) is one of many factors used by NCAA sports committees when evaluating team selection, seeding and bracketing.
The basic RPI consists of a team’s Division I winning percentage (25 percent weight), its opponents’ winning percentage (50 percent weight) and its opponents opponents’ winning percentage (25 percent weight). The RPI is one of many factors the committees use for selecting and seeding teams.
Other criteria the committee considers in the selections process are:
- Rankings by regional advisory committees of coaches;
- Division I record;
- Non-conference record;
- Non-conference RPI;
- Conference record;
- Road record;
- Injuries to key players;
- Other computer rankings (Sagarin, KenPom, etc.);
- Special circumstances that may have affected a team‘s performance in certain games, such as weather-related travel difficulties;
- Record against other teams that are under consideration;
- Record against teams that are in the tournament field.
The committee often refers to "team sheets" when comparing team performance. The team sheets contain in-depth team information about strength of schedule, performance against top-50 teams and home/road records.
The committee creates a seed list 1 through 68 -- which is used to assess competitive balance of the top teams across the four regions of this national championship. Additionally, the seed list reflects the sequential order with which teams will be placed in the bracket.
Automatic Qualifiers: A total of 32 conferences will place an automatic qualifier in the NCAA tournament field. Thirty-one of those will win conference tournaments, while the Ivy League places its regular season champion.
At-Large: With the tournament field of 68, there are 36 at-large spots after the AQs. The committee selects the 36 best teams to fill the at-large berths. There is no limit on the number of at-large teams the committee may select from one conference.