A standard basketball game lasts for 48 minutes, divided into four quarters of 12 minutes each in the NBA. If the game is tied at the end of regulation, it goes into overtime periods, each lasting 5 minutes.
In college basketball, the game lasts for 40 minutes, divided into two halves of 20 minutes each. Overtime periods in college are also 5 minutes long.
The overall length of a basketball game can vary depending on timeouts, breaks, fouls, and other stoppages, so the total time can range from around 2 to 2.5 hours in the NBA and a little less for college games.
