A standard professional basketball game, such as in the NBA, consists of 48 minutes of play, divided into four quarters of 12 minutes each.
However, the total length of a game, including timeouts, halftime, and possible overtime, can vary significantly. Overtime periods last 5 minutes each, and there can be multiple overtime periods if the game is tied at the end of regulation.
In college basketball (NCAA), a game consists of two halves, each lasting 20 minutes, for a total of 40 minutes of play.
