In the NBA, the game clock lasts 12 minutes. There are 4 quarters which are each 12 minutes long.
In NCAA basketball, the game clock lasts 20 minutes. There are 2 halves which are each 20 minutes.
These differences have an impact on the flow of the game. College basketball games go quicker as they are played in two halves, whereas NBA games are a bit more choppy and longer.
There a limit to how long a team can hold the ball. The shot clock keeps track of each possession. The shot clock resets when a basket is made, or any time the ball touches the hoop. In the NBA, the shot clock lasts 24 seconds. In NCAA basketball, the shot clock lasts 30 seconds.
If a team doesn't hit the rim by the time the shot clock runs out, they commit a shot clock violation. As a result, the play will be stopped and the ball will be given to the opposing team to inbound. Similar to the game clock, a successful shot will count as long as the ball leaves the hands of the shooter before the clock reaches zero.
If you want to learn more about the rules of the shot clock, check out basketball shot clock.
Is it possible to stop the game clock or shot clock? With a timeout, teams can stop the clock from ticking, but only temporarily. Players can only call a timeout when they have the ball, or there is a dead ball. If a player calls for a timeout when their team is out of timeouts, there will be a technical foul called.
Here are some glossary terms related to the rules of the clocks in basketball.