text: what is this quarterback rating thing? i saw it during the superbowl.  one of the qb had a "rating" of 109.something.  guess i've been out of touch.  how is this determined?  please help. it is a complicated math formula which gives points based on each aspect of a quarterback's performance ... completed passes per attempt, yards per pass attempt (not just the completions), number of touchdowns, number of interceptions. a perfect score is 158.3 and anything over 100 is considered very good.