2019 RPI Information

Updated: August 19, 2019

IHSAA FOOTBALL

2019 RATINGS PERCENTAGE INDEX

 

The IHSAA began using RPI in 2018 to determine its at-large playoff qualifiers. Below is an explanation of the system. District champions across all six classifications receive automatic qualification into the playoffs.

Updated RPI standings will be published at iahsaa.org/football on Mondays after Week 6.

 

The IHSAA’s RPI Formula

Teams will receive RPI numbers ranging between .0000 and 1.000 (higher is better) through three criteria weighted at different percentages.

  • Your Own Winning Percentage (37.5%)
  • Your Opponents’ Composite Winning Percentage (37.5%)
  • Your Opponents’ Opponents’ Composite Winning Percentage (25%)

So, RPI = (.375 x WP) + (.375 x OWP) + (.250 x OOWP).

 

Three-Way District Ties

New in 2019, only one champion will be named out of each district. Two-way ties are broken through head-to-head competition, but with any true three-way ties for district championships, the automatic qualifying spot as district champion will go to the team with the highest RPI. The other two teams will reenter the at-large field and may qualify for the playoffs through RPI.

 

Head-To-Head Competition

Two updates were approved in 2019 to allow head-to-head competition to supersede RPI in select situations following Week 9 competition.

  1. If two teams are side-by-side for the final spot in the RPI rankings and have played head-to-head in the regular season, the winner of the regular season contest will receive the at-large spot.
  2. If two teams are side-by-side in the final RPI rankings and played in the regular season, the winner of the head-to-head contest will receive the higher playoff seeding.

 

Out-Of-State Opponents

The IHSAA will calculate the winning percentage of an out-of-state opponent into a team’s RPI. However, that opponents’ opponents will have a uniform .500 winning percentage assigned.

 

Cross-Classification Games

Teams are neither penalized nor rewarded for playing up or down in classification for their non-district games. A win over a Class A team is calculated the same in RPI as a win over a Class 4A team.

 

Scheduling & Scoring

The IHSAA assigns districts and district schedules every two years and recommends member schools make non-district schedule requests that suit the goals of their football programs. The RPI takes a team’s entire schedule into account.

RPI does not factor in margin of victory or whether a victory takes place at home or on the road. Wins and losses determine playoff qualification, either via district championship or RPI ranking for an at-large spot.

 

Cancellations & Forfeits

Because RPI uses averages, if a game is cancelled and cannot be rescheduled, it will not negatively affect either team in the formula.

However, if a team drops its football program once the competitive season has begun, that team will forfeit its remaining games to their opponents. If a team drops its program prior to the start of the season and leaves open dates, no forfeits will be assigned.

 

An RPI Example

We will calculate RPI for Team A in this short three-game scenario. To see how RPI will look after nine games and accounting for all teams in a classification, view the 2018 final rankings below.

TEAM A SCHEDULE              OPPONENTS                      OPP. SCHEDULE

Win, Team Y                           Team X: 3-0                            Team X: 4-5

Loss, Team X                          Team Y: 1-2                             Team Y: 6-3

Win, Team Z                           Team Z: 0-3                            Team Z: 8-1

Record: 2-1                           Record: 4-5                           Record: 18-9

WP: .6667                             OWP: .4444                          OOWP: .6667

RPI = (.375 x .6667) + (.375 x .444) + (.250 x .6667)

Team A RPI = .5834

 

2018 Final RPI Rankings

 

Original FAQs | 2018 News Release | Approved 2019 Updates