The rating shown for each conference is the simple average of all of its teams. Other raters (Sagarin, for example) advocate for slightly different calculations, but in my experience this one works well enough.
Rank Conference Mean Rating ---- ------------------------- ----------- 1 SEC 3.35 2 Big Ten 3.02 3 Big 12 2.33 4 ACC 2.24 5 Big East 1.67 6 Ivy 0.51 7 Atlantic 10 0.34 8 American 0.29 9 Mountain West 0.04 10 Sun Belt 0.02 11 West Coast -0.04 12 Conference USA -0.22 13 Mid-American -0.33 14 Big Sky -0.47 15 Missouri Valley -0.54 16 Summit -0.57 17 America East -0.57 18 WAC -0.64 19 Atlantic Sun -0.73 20 Ohio Valley -0.75 21 Southern -0.83 22 Colonial -0.86 23 Patriot -0.90 24 Horizon -0.90 25 Big West -0.96 26 Southland -1.01 27 MAAC -1.52 28 Big South -1.78 29 MEAC -1.82 30 SWAC -2.10 31 NEC -2.73 32 Non-D1 -5.38
