The Rating Percentage Index is one of many factors used by NCAA sports committees when evaluating teams 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’ winning percentage (25 percent weight). The RPI is one of many factors the committees use for selecting and seeding teams.
The team sheets contains 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 64 -- 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 31 conferences will place an automatic qualifier in the NCAA tournament field. Thirty of those will win conference tournaments, with the other being the Ivy League, which places its regular season champion.
At-Large: There are 33 at-large spots after the AQs. The committee selects the 33 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.
There's no limit to the number of teams from a conference that can be selected for participation in the tourney.
Team performance in past years does not impact the current year's value as an at-large candidate.
A late season/conference tournament injury to a key player could impact a team's seed.