The IdahoSports.com Football RPI is a projection of the Idaho RPI and uses the same formula that the Idaho High School Activities Association will use for the 2018 football season. The difference between the two is that the IHSAA formula and rankings use information solely from MaxPreps, while the rankings posted here use scores and records from IdahoSports.com. These scores are found, checked, and recorded by IdahoSports.com. Scores and records of out-of-state opponents are found, checked, and recorded by Dayton Robison, who conducts the 'Robison RPI' and the IdahoSports.com Football RPI.
IdahoSports.com Football RPI Methodology
The IdahoSports.com Football Ratings Percentage Index, or RPI for short, is a ratings system comprised of three components:
- A team's own winning percentage
- A team's opponents average winning percentage
- A team's opponents' opponents average winning percentage.
Each team receives a composite score based on these factors, which are each weighted as follows:
- Own winning percentage: 30% of composite score
- Opponents winning percentage: 40%
- Opponents' opponents winning percentage: 30%
Margin of victory is not a factor at all in the RPI. A win against a team one classification higher is worth 15% more, while a win against a team one classification lower is worth 15% less. This deduction only applies on the second contest against a smaller opponent - the first game against a smaller opponent is counted as a same classification game.
The IHSAA's Idaho RPI will be used as follows for the 2018 football season:
- 3A: will be used to decide the At-Large berth
- 2A: will be used to determine the three At-Large berths and, following the regional round, will seed the state quarterfinals.
The Idaho RPI will not be used at all in 5A, 4A, 1AD1, and 1AD2.
Legend
Composite: The total RPI score for a team
WP: A team's own winning percentage
OWP: A team's opponents average winning percentage
OOWP: A team's opponents' opponents average winning percentage
Week 9 IdahoSports.com Football RPI
Results through Oct. 21, 2018
CLASS 5A
RANK |
SCHOOL |
COMPOSITE |
WP |
OWP |
OOWP |
1 |
Coeur d'Alene |
0.71237 |
1.00000 |
0.62578 |
0.54020 |
2 |
Highland |
0.66159 |
0.85556 |
0.58889 |
0.56455 |
3 |
Rocky Mountain |
0.65000 |
1.00000 |
0.50000 |
0.50000 |
4 |
Madison |
0.59024 |
0.63333 |
0.58125 |
0.55913 |
5 |
Mountain View |
0.58333 |
0.77778 |
0.50000 |
0.50000 |
6 |
Lewiston |
0.56257 |
0.61667 |
0.54276 |
0.53490 |
7 |
Capital |
0.55000 |
0.66667 |
0.50000 |
0.50000 |
8 |
Eagle |
0.55000 |
0.66667 |
0.50000 |
0.50000 |
9 |
Rigby |
0.54875 |
0.41111 |
0.65288 |
0.54757 |
10 |
Borah |
0.51667 |
0.55556 |
0.50000 |
0.50000 |
11 |
Skyview |
0.51667 |
0.55556 |
0.50000 |
0.50000 |
12 |
Post Falls |
0.50432 |
0.48125 |
0.51775 |
0.50949 |
13 |
Lake City |
0.45293 |
0.30000 |
0.51935 |
0.51729 |
14 |
Meridian |
0.45000 |
0.33333 |
0.50000 |
0.50000 |
15 |
Centennial |
0.45000 |
0.33333 |
0.50000 |
0.50000 |
16 |
Thunder Ridge |
0.40089 |
0.00000 |
0.59306 |
0.54557 |
17 |
Boise |
0.38333 |
0.11111 |
0.50000 |
0.50000 |
18 |
Timberline |
0.35000 |
0.00000 |
0.50000 |
0.50000 |
CLASS 4A
RANK |
SCHOOL |
COMPOSITE |
WP |
OWP |
OOWP |
1 |
Hillcrest |
0.66214 |
0.92222 |
0.55000 |
0.55158 |
2 |
Century |
0.63474 |
0.77778 |
0.64406 |
0.47929 |
3 |
Bishop Kelly |
0.62337 |
0.87500 |
0.51797 |
0.51226 |
4 |
Skyline |
0.61098 |
0.82778 |
0.48773 |
0.55850 |
5 |
Middleton |
0.60689 |
0.77778 |
0.53978 |
0.52548 |
6 |
Idaho Falls |
0.60052 |
0.70000 |
0.56389 |
0.54988 |
7 |
Nampa |
0.58930 |
0.77778 |
0.51399 |
0.50122 |
8 |
Twin Falls |
0.56938 |
0.77778 |
0.47212 |
0.49067 |
9 |
Minico |
0.55568 |
0.77778 |
0.45635 |
0.46601 |
10 |
Vallivue |
0.54154 |
0.66667 |
0.47232 |
0.50871 |
11 |
Columbia |
0.53951 |
0.55556 |
0.54593 |
0.51489 |
12 |
Blackfoot |
0.53119 |
0.46111 |
0.58403 |
0.53081 |
13 |
Kuna |
0.51263 |
0.57222 |
0.45635 |
0.52809 |
14 |
Bonneville |
0.47644 |
0.46111 |
0.44514 |
0.53350 |
15 |
Moscow |
0.46769 |
0.35625 |
0.55432 |
0.46361 |
16 |
Sandpoint |
0.46285 |
0.33333 |
0.53304 |
0.49880 |
17 |
Pocatello |
0.45062 |
0.33333 |
0.51181 |
0.48633 |
18 |
Shelley |
0.44769 |
0.22222 |
0.55625 |
0.52842 |
19 |
Ridgevue |
0.44001 |
0.22222 |
0.55565 |
0.50362 |
20 |
Mountain Home |
0.43482 |
0.44444 |
0.40893 |
0.45970 |
21 |
Preston |
0.43475 |
0.44444 |
0.37907 |
0.49929 |
22 |
Burley |
0.41342 |
0.33333 |
0.43671 |
0.46247 |
23 |
Lakeland |
0.40859 |
0.39375 |
0.35504 |
0.49484 |
24 |
Jerome |
0.40000 |
0.33333 |
0.40476 |
0.46032 |
25 |
Caldwell |
0.38930 |
0.11111 |
0.51399 |
0.50122 |
26 |
Emmett |
0.38406 |
0.11111 |
0.50010 |
0.50231 |
27 |
Canyon Ridge |
0.33923 |
0.11111 |
0.43462 |
0.44016 |
28 |
Wood River |
0.33537 |
0.12500 |
0.41094 |
0.44498 |
CLASS 3A
RANK |
SCHOOL |
COMPOSITE |
WP |
OWP |
OOWP |
1 |
Sugar-Salem |
0.66744 |
0.89375 |
0.57679 |
0.56199 |
2 |
Homedale |
0.64782 |
0.96667 |
0.48085 |
0.55159 |
3 |
Kimberly |
0.60954 |
0.93889 |
0.43839 |
0.50837 |
4 |
Fruitland |
0.59891 |
0.62500 |
0.65301 |
0.50069 |
5 |
Marsh Valley |
0.58301 |
0.73125 |
0.49051 |
0.55809 |
6 |
South Fremont |
0.56280 |
0.58750 |
0.53214 |
0.57898 |
7 |
Gooding |
0.54201 |
0.77778 |
0.37242 |
0.53235 |
8 |
Weiser |
0.53126 |
0.62500 |
0.47969 |
0.50629 |
9 |
Teton |
0.50523 |
0.25000 |
0.68199 |
0.52478 |
10 |
American Falls |
0.50290 |
0.35625 |
0.58103 |
0.54540 |
11 |
Timberlake |
0.49833 |
0.71917 |
0.33426 |
0.49625 |
12 |
Priest River |
0.48423 |
0.35625 |
0.57515 |
0.49098 |
13 |
Filer |
0.47949 |
0.20556 |
0.68899 |
0.47408 |
14 |
Snake River |
0.47415 |
0.26875 |
0.60391 |
0.50654 |
15 |
Kellogg |
0.46069 |
0.28571 |
0.56956 |
0.49049 |
16 |
Parma |
0.40499 |
0.11111 |
0.54187 |
0.51638 |
17 |
Bonners Ferry |
0.35380 |
0.11111 |
0.42442 |
0.50234 |
18 |
Buhl |
0.34472 |
0.00000 |
0.50792 |
0.47185 |
19 |
Payette |
0.34260 |
0.00000 |
0.49425 |
0.48300 |
CLASS 2A
RANK |
SCHOOL |
COMPOSITE |
WP |
OWP |
OOWP |
1 |
Declo |
0.72793 |
1.11250 |
0.56451 |
0.56126 |
2 |
Grangeville |
0.70928 |
1.11813 |
0.51935 |
0.55370 |
3 |
North Fremont |
0.66204 |
1.03750 |
0.44795 |
0.57203 |
4 |
West Side |
0.64226 |
1.01875 |
0.44196 |
0.53283 |
5 |
McCall-Donnelly |
0.62908 |
0.75000 |
0.62223 |
0.51729 |
6 |
West Jefferson |
0.59159 |
0.76875 |
0.49048 |
0.54925 |
7 |
Aberdeen |
0.56808 |
0.64375 |
0.55982 |
0.50343 |
8 |
New Plymouth |
0.56375 |
0.64375 |
0.54408 |
0.50996 |
9 |
Cole Valley Chr. |
0.56154 |
0.76875 |
0.44464 |
0.51018 |
10 |
St. Maries |
0.56131 |
0.71875 |
0.48780 |
0.50190 |
11 |
Melba |
0.53431 |
0.51875 |
0.56239 |
0.51244 |
12 |
Firth |
0.52240 |
0.42857 |
0.61463 |
0.49326 |
13 |
Orofino |
0.51644 |
0.39375 |
0.59247 |
0.53777 |
14 |
Ririe |
0.49986 |
0.42857 |
0.55306 |
0.50023 |
15 |
Nampa Christian |
0.45213 |
0.26875 |
0.52804 |
0.53429 |
16 |
Soda Springs |
0.43584 |
0.25000 |
0.50476 |
0.52979 |
17 |
Malad |
0.43065 |
0.25000 |
0.51935 |
0.49304 |
18 |
Wendell |
0.42849 |
0.41250 |
0.38315 |
0.50492 |
19 |
Salmon |
0.39820 |
0.14286 |
0.48248 |
0.54116 |
20 |
Bear Lake |
0.39753 |
0.12500 |
0.52054 |
0.50607 |
21 |
Marsing |
0.37725 |
0.14375 |
0.44732 |
0.51732 |
CLASS 1AD1
RANK |
SCHOOL |
COMPOSITE |
WP |
OWP |
OOWP |
1 |
Valley |
0.68990 |
0.85625 |
0.67753 |
0.54006 |
2 |
Oakley |
0.68113 |
0.85625 |
0.62738 |
0.57768 |
3 |
Prairie |
0.67008 |
0.87500 |
0.61637 |
0.53678 |
4 |
Challis |
0.63028 |
0.81429 |
0.54796 |
0.55603 |
5 |
Lapwai |
0.60341 |
0.75000 |
0.55089 |
0.52685 |
6 |
Raft River |
0.60094 |
0.71429 |
0.52568 |
0.58794 |
7 |
Wilder |
0.59192 |
0.83750 |
0.49658 |
0.47345 |
8 |
Idaho City |
0.56481 |
0.81429 |
0.45085 |
0.46727 |
9 |
Grace |
0.55913 |
0.50000 |
0.62083 |
0.53598 |
10 |
Clearwater Valley |
0.52733 |
0.73125 |
0.35833 |
0.54875 |
11 |
Potlatch |
0.52137 |
0.57143 |
0.48333 |
0.52203 |
12 |
Kamiah |
0.52101 |
0.62500 |
0.40833 |
0.56726 |
13 |
Glenns Ferry |
0.49640 |
0.33333 |
0.59034 |
0.53420 |
14 |
Butte County |
0.45701 |
0.26429 |
0.51616 |
0.57087 |
15 |
Genesee |
0.43533 |
0.12500 |
0.64628 |
0.46440 |
16 |
Rimrock |
0.43234 |
0.37500 |
0.44048 |
0.47885 |
17 |
Troy |
0.41567 |
0.12500 |
0.61670 |
0.43832 |
18 |
Notus |
0.39539 |
0.23125 |
0.45833 |
0.47561 |
19 |
Wallace |
0.33522 |
0.12500 |
0.38857 |
0.47431 |
CLASS 1AD2
RANK |
SCHOOL |
COMPOSITE |
WP |
OWP |
OOWP |
1 |
Carey |
0.67353 |
1.00000 |
0.55179 |
0.50939 |
2 |
Kendrick |
0.63718 |
1.04286 |
0.38367 |
0.56950 |
3 |
Deary |
0.60902 |
0.71429 |
0.61963 |
0.48961 |
4 |
Lighthouse Chr. |
0.60519 |
0.87500 |
0.47768 |
0.50538 |
5 |
Salmon River |
0.56437 |
0.64375 |
0.55283 |
0.50039 |
6 |
Murtaugh |
0.56326 |
0.66667 |
0.53942 |
0.49164 |
7 |
Dietrich |
0.56155 |
0.66667 |
0.52817 |
0.50093 |
8 |
North Gem |
0.54127 |
0.59286 |
0.51650 |
0.52270 |
9 |
Garden Valley |
0.53066 |
0.51875 |
0.54405 |
0.52473 |
10 |
Mackay |
0.51134 |
0.42857 |
0.57364 |
0.51105 |
11 |
Camas County |
0.50399 |
0.42857 |
0.56122 |
0.50309 |
12 |
Clark Fork |
0.50387 |
0.57143 |
0.45993 |
0.49491 |
13 |
Mullan |
0.49777 |
0.40000 |
0.61533 |
0.43877 |
14 |
Tri-Valley |
0.48684 |
0.45000 |
0.52976 |
0.46647 |
15 |
Kootenai |
0.44751 |
0.55000 |
0.31706 |
0.51896 |
16 |
Hagerman |
0.44444 |
0.37500 |
0.47917 |
0.46758 |
17 |
Lewis County |
0.42821 |
0.16667 |
0.61508 |
0.44058 |
18 |
Horseshoe Bend |
0.42089 |
0.51875 |
0.30770 |
0.47395 |
19 |
Rockland |
0.41473 |
0.39375 |
0.38006 |
0.48193 |
20 |
Castleford |
0.39014 |
0.22222 |
0.46402 |
0.45953 |
21 |
Hansen |
0.37025 |
0.12500 |
0.48140 |
0.46730 |
22 |
Lakeside |
0.35441 |
0.16667 |
0.41357 |
0.46328 |
23 |
Cascade |
0.33604 |
0.14286 |
0.37636 |
0.47546 |
24 |
Council |
0.32687 |
0.00000 |
0.47279 |
0.45918 |
25 |
Clark-Watersprings |
0.32298 |
0.00000 |
0.43786 |
0.49281 |
|