An RPI (Ratings Percentage Index) formula will be used for all team bracketed playoffs. The formula will be as follows for all sports:
RPI = (0.3 x WP) + (0.4 x OWP) + (0.3 x OOWP)
• Winning Percentage (WP): Divide the number of wins by the
number of total games played. A tie is worth half a win. If a win in an
individual contest gives that contest a winning percentage of 1.00, a tie will
give that individual contest a winning percentage of .500 for both teams.
• Opponents’ Winning Percentage (OWP): Average the winning
percentages of a team’s opponents. (Note: This is not calculated via the
opponents' combined record, instead of by averaging each winning percentage of
the opponents.) All games involving the team whose RPI is being calculated are
ignored in this process.
• Opponents’ Opponents Winning Percentage (OOWP): The same
process as described above, except calculated for the opponents of a team’s
opponents. (Note: There is an exception for out-of-state teams, which is
addressed below.)
Out-of-State Opponents
Out-of-state opponents from the following states will be
counted the same as in-state opponents provided they have a verified MaxPreps
account and schedule:
• Georgia
• South Carolina
• Tennessee
• Virginia
All other out-of-state opponents will be handled in the
following manner:
• Their direct winning percentage (for example, .750) will
count toward the formula, but each of their opponents will have a .500 winning
percentage assigned.
• The .500 figure was selected because it is the average
value of opponents’ opponents winning percentages across all sports in data
gathered from the states using RPI, such as Colorado, Utah, and Washington.
• Note: It is the NCHSAA member school's responsibility to
ensure that the data from their out-of-state opponent is correctly listed on
MaxPreps.
International Opponents
International opponents will not count toward the RPI
calculation.
Non-Varsity Competition
Contests against the non-varsity competition will not count
toward the RPI calculation.
In-State (Non-NCHSAA) Competition
Contests against in-state, non-NCHSAA schools will be
handled in the following manner:
• Their direct winning percentage (for example, .750) will
count toward the formula, but each of their opponents will have a .500 winning
percentage assigned.
• The .500 figure was selected because it is the average
value of opponents’ opponents winning percentages across all sports in data
gathered from the states using RPI, such as Colorado, Utah, and Washington.
• Note: It is the responsibility of the NCHSAA member school
to ensure that the data from their opponent is correctly listed on MaxPreps.
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