The following are the final ARGH power ratings for the 112 Division 1-A teams for 1998. Middle Tennessee State is also included in the ratings, as they played two games against current Division 1-A teams and will be joining Division 1-A in 1999. Buffalo, who also joins Division 1-A in 1999, will not be rated until next year, since they played no games against Division 1-A teams in 1998.
The final estimated home field advantage for 1998 is .594. Home field advantage is the estimated chance that the home team would win a game between two otherwise equal teams.
| This Week | Last Week | Team | Record | Power Rating | Pre-season |
|---|---|---|---|---|---|
| 1 | 1 | Tennessee | 13-0 | .932 | 7 |
| 2 | 4 | Ohio St. | 11-1 | .918 | 4 |
| 3 | 2 | Florida St. | 11-2 | .902 | 3 |
| 4 | 5 | Wisconsin | 11-1 | .887 | 15 |
| 5 | 3 | Kansas St. | 11-2 | .876 | 2 |
| 6 | 8 | Florida | 10-2 | .860 | 5 |
| 7 | 10 | Arizona | 12-1 | .842 | 36 |
| 8 | 6 | Texas A&M | 11-3 | .839 | 18 |
| 9 | 11 | Air Force | 12-1 | .838 | 53 |
| 10 | 7 | UCLA | 10-2 | .821 | 10 |
| 11 | 9 | Nebraska | 9-4 | .820 | 6 |
| 12 | 15 | Penn State | 9-3 | .812 | 19 |
| 13 | 13 | Tulane | 12-0 | .800 | 33 |
| 14 | 19 | Michigan | 10-3 | .792 | 1 |
| 15 | 22 | Virginia Tech | 9-3 | .785 | 40 |
| 16 | 21 | Purdue | 9-4 | .782 | 31 |
| 17 | 12 | Arkansas | 9-3 | .771 | 32 |
| 18 | 23 | Georgia Tech | 10-2 | .771 | 22 |
| 19 | 24 | Texas | 9-3 | .757 | 73 |
| 20 | 16 | Virginia | 9-3 | .752 | 28 |
| 21 | 25 | Missouri | 8-4 | .748 | 41 |
| 22 | 20 | Syracuse | 8-4 | .746 | 23 |
| 23 | 14 | Southern Cal | 8-5 | .744 | 25 |
| 24 | 27 | Georgia | 9-3 | .741 | 21 |
| 25 | 18 | Notre Dame | 9-3 | .740 | 20 |
| 26 | 26 | Miami, OH | 10-1 | .728 | 49 |
| 27 | 17 | Oregon | 8-4 | .726 | 17 |
| 28 | 31 | Miami, FL | 9-3 | .713 | 60 |
| 29 | 30 | West Virginia | 8-4 | .693 | 39 |
| 30 | 34 | Colorado | 8-4 | .682 | 44 |
| 31 | 29 | Mississippi St. | 8-5 | .675 | 37 |
| 32 | 28 | S. Mississippi | 7-5 | .664 | 16 |
| 33 | 33 | Kentucky | 7-5 | .656 | 47 |
| 34 | 40 | Marshall | 12-1 | .649 | 26 |
| 35 | 37 | Colorado St. | 8-4 | .642 | 13 |
| 36 | 38 | Michigan St. | 6-6 | .641 | 24 |
| 37 | 32 | Texas Tech | 7-5 | .626 | 51 |
| 38 | 35 | Alabama | 7-5 | .623 | 56 |
| 39 | 41 | C. Florida | 9-2 | .621 | 62 |
| 40 | 43 | Louisiana St. | 4-7 | .602 | 8 |
| 41 | 36 | Washington | 6-6 | .601 | 11 |
| 42 | 39 | N. Carolina St. | 7-5 | .600 | 63 |
| 43 | 46 | Wyoming | 8-3 | .589 | 52 |
| 44 | 47 | N. Carolina | 7-5 | .586 | 12 |
| 45 | 42 | Brigham Young | 9-5 | .582 | 43 |
| 46 | 44 | Oklahoma St. | 5-6 | .579 | 30 |
| 47 | 45 | Arizona St. | 5-6 | .553 | 14 |
| 48 | 58 | Texas Christian | 7-5 | .551 | 108 |
| 49 | 55 | Mississippi | 7-5 | .549 | 35 |
| 50 | 51 | Minnesota | 5-6 | .544 | 70 |
| 51 | 48 | Oregon St. | 5-6 | .542 | 58 |
| 52 | 50 | Utah | 7-4 | .533 | 55 |
| 53 | 49 | San Diego St. | 7-5 | .517 | 87 |
| 54 | 54 | Louisiana Tech | 6-6 | .511 | 57 |
| 55 | 52 | California | 5-6 | .501 | 38 |
| 56 | 56 | Oklahoma | 5-6 | .495 | 84 |
| 57 | 62 | Idaho | 9-3 | .493 | 101 |
| 58 | 53 | Louisville | 7-5 | .493 | 103 |
| 59 | 57 | Auburn | 3-8 | .493 | 9 |
| 60 | 59 | Rice | 5-6 | .486 | 48 |
| 61 | 61 | Indiana | 4-7 | .473 | 88 |
| 62 | 60 | Fresno St. | 5-6 | .460 | 66 |
| 63 | 67 | Toledo | 7-5 | .441 | 46 |
| 64 | 65 | Boston College | 4-7 | .439 | 81 |
| 65 | 63 | Nevada | 6-5 | .438 | 74 |
| 66 | 69 | S. Methodist | 5-7 | .435 | 71 |
| 67 | 66 | Kansas | 4-7 | .427 | 67 |
| 68 | 68 | E. Carolina | 6-5 | .420 | 68 |
| 69 | 64 | Stanford | 3-8 | .417 | 54 |
| 70 | 70 | Bowling Green | 5-6 | .410 | 96 |
| 71 | 71 | Tulsa | 4-7 | .391 | 90 |
| 72 | 75 | W. Michigan | 7-4 | .376 | 64 |
| 73 | 81 | Iowa | 3-8 | .370 | 29 |
| 74 | 76 | Iowa St. | 3-8 | .370 | 89 |
| 75 | 78 | Ohio | 5-6 | .369 | 27 |
| 76 | 74 | Houston | 3-8 | .366 | 92 |
| 77 | 77 | Clemson | 3-8 | .365 | 42 |
| 78 | 72 | Baylor | 2-9 | .363 | 86 |
| 79 | 73 | Washington St. | 3-8 | .359 | 50 |
| 80 | 80 | Duke | 4-7 | .353 | 77 |
| 81 | 79 | Army | 3-8 | .350 | 98 |
| 82 | 82 | Wake Forest | 3-8 | .340 | 45 |
| 83 | 85 | Northwestern | 3-9 | .329 | 59 |
| 84 | 83 | Maryland | 3-8 | .319 | 83 |
| 85 | 86 | Rutgers | 5-6 | .313 | 113 |
| 86 | 87 | Boise St. | 6-5 | .308 | 75 |
| 87 | 84 | San Jose St. | 4-8 | .307 | 91 |
| 88 | 88 | UAB | 4-7 | .299 | 93 |
| 89 | 89 | NE Louisiana | 5-6 | .295 | 65 |
| 90 | 91 | C. Michigan | 6-5 | .294 | 97 |
| 91 | 92 | S. Carolina | 1-10 | .282 | 34 |
| 92 | 94 | Illinois | 3-8 | .281 | 107 |
| 93 | 90 | UTEP | 3-8 | .278 | 95 |
| 94 | 95 | Pittsburgh | 2-9 | .268 | 79 |
| 95 | 93 | Memphis | 2-9 | .265 | 72 |
| 96 | 97 | New Mexico St. | 3-8 | .260 | 104 |
| 97 | 96 | Navy | 3-8 | .259 | 94 |
| 98 | 100 | Akron | 4-7 | .254 | 78 |
| 99 | 98 | N. Texas | 3-8 | .250 | 102 |
| 100 | 99 | Utah St. | 3-8 | .246 | 85 |
| 101 | 101 | Vanderbilt | 2-9 | .244 | 80 |
| 102 | 102 | Cincinnati | 2-9 | .226 | 61 |
| 103 | 103 | New Mexico | 3-9 | .214 | 76 |
| 104 | 104 | Temple | 2-9 | .197 | 100 |
| 105 | 105 | Arkansas St. | 4-8 | .177 | 99 |
| 106 | 106 | E. Michigan | 3-8 | .174 | 106 |
| 107 | 107 | M. Tennessee St. | 5-5 | .168 | 114 |
| 108 | 108 | SW Louisiana | 2-9 | .152 | 111 |
| 109 | 109 | N. Illinois | 2-9 | .140 | 110 |
| 110 | 111 | UNLV | 0-11 | .132 | 69 |
| 111 | 110 | Wild Card U. | 9-44 | .126 | 112 |
| 112 | 112 | Ball St. | 1-10 | .105 | 82 |
| 113 | 113 | Hawaii | 0-12 | .067 | 105 |
| 114 | 114 | Kent | 0-11 | .053 | 109 |
The following are the power ratings for the various conferences. Non-conference opponents' records assume a 1-10-1 record for non-Division 1-A teams, to best simulate their 6-41 record against Division 1-AA competition:
| Conference | Power Rating | Non-Conference Record | Winning Pct. | Non-Conference Opponents' Record | Winning Pct. |
|---|---|---|---|---|---|
| Big Twelve | .632 | 33-12 | .733 | 252-271 | .482 |
| Big Ten | .621 | 30-12 | .714 | 246-245 | .501 |
| SEC | .619 | 31-13 | .705 | 265-251 | .514 |
| Pac-10 | .611 | 25-12 | .676 | 240-201 | .544 |
| ACC | .554 | 21-12 | .636 | 192-196 | .495 |
| Big East | .519 | 19-17 | .528 | 217-204 | .515 |
| Conference USA | .448 | 18-25 | .419 | 278-227 | .550 |
| WAC | .439 | 22-36 | .379 | 357-322 | .526 |
| Independents | .382 | 30-37 | .448 | 360-427 | .457 |
| MAC | .333 | 12-23 | .343 | 179-225 | .443 |
| Big West | .333 | 15-22 | .405 | 174-257 | .404 |