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Basketball RPI

Following are frequently asked questions about the RPI. Click the title of the question to see the response.

The Rating Percentage Index is a statistical system used to comparatively rank teams. This transparent system allows anyone to calculate the formula. The RPI will be used to both award at-large berths and to seed teams for both the 3A and 4A state tournaments.

The formula is: RPI = (30% x MWP) + (40% x OWP) + (30% x OOWP)

• MWP (Modified Winning Percentage): The teams winning percentage versus all other 3A and 4A varsity teams.  To calculate: Divide the number of games won (against varsity level 3A and 4A teams) by total number games played (against varsity level 3A and 4A teams).

• OWP (Opponents Winning Percentage): Average of the MWP of a team’s opponents. *

(Note: The OWP is not calculated via the combined record of the opponents, but rather by averaging the winning percentage of the opponents).

• OOWP (Opponents’ Opponents Winning Percentage: Same process as OWP except the calculation is with the opponents of the team’s opponent.*

* when calculating OWP and OOWP, the head-to-head matchup between teams is taken out of the equation.

All 3A & 4A varsity games against all other 3A and 4A varsity teams are used in the RPI. Games which are NOT included in the RPI are results against 1A, 2A, sub-varsity, and out-of-state teams.  For example:  If a 3A varsity team plays a 4A JV team, that result would not factor into the RPI.

There are several advantages to using the RPI.  Because the rankings can be seen during the regular season, schools will have better sense of their chances for a higher seed or an at-large selection sooner in the process.  This will also help ensure all games are correctly entered throughout the season. Additionally, the RPI has the third layer, OOWP, which the previous WPI system did not calculate.

The official ASAA RPI standings will be updated every hour on ASAA365.com. This update will occur on the half-hour. It is worth noting that any RPI data published elsewhere is unofficial and could be incorrect.

School teams should be inputting their schedule and scores into MaxPreps. The official RPI feed will be calculated based on the results entered into MaxPreps by the school coaching/admin staff.  Contact ASAA for assistance on entering scores.

The RPI is based on a win-loss records. Score differential will have no bearing on the RPI.

The RPI formula works off the averages of three components: modified winning percentage, opponents’ winning percentage and opponents’ opponents winning percentage, so an imbalance of games between two teams will have virtually no impact on the ranking system.

The final RPI calculations used for at-large and seeding purposes will be based on the final records of all teams.  This will include games played during the conference tournament. However, a committee will review the seeds to possibly change the seeds to avoid conference opponents playing each other in the first round.

OWP is the average winning percentages of a team’s opponents. (Note: This is not calculated via the combined record of the opponents, but rather averaging each winning percentage of the opponents.) It is also important to remember that when calculating OWP (and OOWP), the head-to-head matchup between teams is taken out of the equation. That game already is figured in both teams’ WP. The rationale for omitting this result is so there is not a double increase or a double decrease for a specific game. Doing so gives an accurate assessment of how teams rate when they are not playing each other.

Yes, all games played thru the conference championship tournaments will be included.

Yes, all games, including endowments are included in the RPI.

The at-large selection will be solely based on the final RPI results.  However, a committee will review the seeds to possibly change the seeds to avoid conference opponents playing each other in the first round.

Rank = RPI rank of the School Team 
RPI = Ranking Percentage Index
School = School Team
MWP = Modified Winning Percentage (record of team versus eligible varsity 3A & 4A games only)
OWP = Opponents Winning Percentage
OOWP = Opponents Opponents Winning Percentage
WL = Overall win loss record against all teams (includes 1A, 2A, 3A, 4A schools but does not include non ASAA member schools)

Rank = RPI rank of the School Team 
RPI = Ranking Percentage Index
School = School Team
MWP = Modified Winning Percentage (record of team versus eligible varsity 3A & 4A games only)
OWP = Opponents Winning Percentage
OOWP = Opponents Opponents Winning Percentage
WL = Overall win loss record against all teams (includes 1A, 2A, 3A, 4A schools but does not include non ASAA member schools)

3A Boys Classification

RankRPISchoolMWPOWPOOWPWL
10.74005Grace Christian0.900000.752200.5638911-1
20.61922Houston0.625000.775310.405325-4
30.58909Nome-Beltz0.818180.461490.5301311-2
40.56361Valdez0.800000.387510.5620410-2
50.55933Mt. Edgecumbe0.818180.345830.585159-2
60.52113Barrow0.500000.550460.503166-6
70.51817Kenai Central0.583330.449130.545068-6
80.49185Bethel0.750000.313650.471308-2
90.46163Sitka0.625000.262220.564157-3
100.44357Kotzebue0.500000.386660.463038-4
110.40617Ben Eielson0.200000.535650.439693-8
120.39371Delta0.500000.331630.370204-3
130.39282Seward0.400000.316770.487064-6
140.36904Homer0.090910.559870.392741-11
150.36281Galena0.000000.625000.376031-3
160.34215Redington0.000000.567840.383380-11
170.31963Nikiski0.090910.415980.419902-11
180.20329Hutchison0.000000.234130.365471-7

4A Boys Classification

RankRPISchoolMWPOWPOOWPWL
10.71582Bettye Davis East Anchorage1.000000.595830.591638-0
20.68091Dimond0.909090.608080.5498410-1
30.66162West Valley0.928570.554310.5377614-1
40.60886Monroe Catholic0.777780.518170.560887-2
50.59687Anchorage Christian0.636360.604210.547607-4
60.57847Wasilla0.857140.366400.582557-1
70.57826West Anchorage0.571430.599600.556654-3
80.57725Colony0.818180.377920.602089-2
90.55734Service0.615380.486380.593928-5
100.55110Lathrop0.400000.706560.494945-6
110.53891Juneau-Douglas0.545450.561410.502387-5
120.52672Ketchikan0.555560.436570.618098-4
130.50304Bartlett0.444440.530230.525385-5
140.46379Soldotna0.230770.614760.495523-12
150.46268North Pole0.625000.347360.454136-3
160.45889Thunder Mountain0.111110.712620.468372-8
170.45509Chugiak0.250000.582280.490613-6
180.42746Kodiak0.333330.418080.534103-6
190.40225South Anchorage0.181820.441370.570533-9
200.39818Palmer0.000000.649760.460920-12
210.39641Eagle River0.000000.638100.470580-7

3A Girls Classification

RankRPISchoolMWPOWPOOWPWL
10.66567Grace Christian0.777780.663230.556837-2
20.58395Monroe Catholic0.750000.443150.605646-2
30.56741Barrow0.571430.638310.468864-3
40.54396Mt. Edgecumbe0.818180.303990.589699-2
50.53585Kenai Central0.750000.347300.5731011-3
60.53039Valdez1.000000.091510.6459410-0
70.51428Sitka0.750000.313360.546459-3
80.50867Seward0.800000.276460.526978-2
90.50086Nome-Beltz0.600000.428490.498228-5
100.47601Bethel0.571430.359050.536557-3
110.41808Delta0.000000.717860.436450-4
120.41588Galena0.000000.825000.286270-4
130.41245Homer0.200000.611960.358882-8
140.39430Nikiski0.272730.476210.406664-8
150.39135Houston0.000000.690740.383500-9
160.37464Ben Eielson0.000000.634130.403280-10
170.35269Kotzebue0.125000.464950.430722-8
180.33918Redington0.000000.574200.365000-11

4A Girls Classification

RankRPISchoolMWPOWPOOWPWL
10.77806Anchorage Christian1.000000.745280.599827-0
20.71214Wasilla1.000000.568180.616236-0
30.68943Juneau-Douglas0.750000.748110.550636-2
40.61932West Valley0.714290.566330.595035-2
50.60529North Pole0.833330.414970.631036-1
60.60235Lathrop0.625000.634080.537395-3
70.58611Colony0.750000.469640.577506-2
80.56681West Anchorage0.750000.462500.522713-1
90.56176Ketchikan0.625000.548110.516725-3
100.55560Thunder Mountain0.636360.503830.543878-4
110.54419Dimond1.000000.212500.530644-0
120.51916Soldotna0.384620.582480.569305-8
130.50351Chugiak0.333330.641670.489472-4
140.47487Palmer0.222220.671350.465532-8
150.45441South Anchorage0.222220.639860.439332-7
160.38939Bartlett0.333330.323020.533962-4
170.37518Service0.166670.559790.337561-5
180.34710Kodiak0.000000.516670.468120-8
190.34317Bettye Davis East Anchorage0.200000.322140.514371-4
200.24257Eagle River0.000000.281250.433570-4

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