In the NFL, the length of halftime is 12 minutes. In some cases such as the Super Bowl the halftime may be slightly longer.
The length of half-time in college football in the United States is 20 minutes. The half-time duration does not change in NCAA football.
Half-time began as a way to give players a short break from game play. Half-time is also an intermission for fans and provides some form of entertainment.
An NFL football game is divided into four periods. Each period has a length of 15 minutes and 2-minute breaks between periods. An official clock is used to track game time.