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:
- An extensive season-long evaluation of teams through watching games, conference monitoring calls and regional advisory committee rankings;
- Complete box scores and results;
- Head-to-head results and results versus common opponents;
- Imbalanced conference schedules and results;
- Overall and non-conference strength of schedule;
- The quality of wins and losses;
- Road record;
- Player and coach availability; and
- Various computer metrics.
Each of the 10 committee members uses these various resources to form his or her own opinion, resulting in the committee’s consensus position on selection and seeding.
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.