QUICK ANSWER

An NFL or college football quarter is 15 minutes on the game clock, while high school quarters are usually 12 minutes. In real time, a quarter takes much longer because the clock often stops.

A quarter in the NFL or college football is 15 minutes on the game clock. High school quarters are usually 12 minutes. You can find the NFL's timing rules in its official rulebook.

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The real-world time is much longer. A game takes around three hours because the clock often stops. As a rough guide, one quarter takes about 45 minutes in real time, but this can vary a lot.

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What Makes A Quarter Last Longer

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Commercial Breaks

TV timeouts add a lot of time to each half, including in national broadcasts like America's Game of the Week. A quarter with more of them will take longer.

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The Game Situation

Incomplete passes, timeouts, and some out-of-bounds plays stop the clock. A team trying to save time can make a quarter longer. A team running the ball with a lead can make one shorter.

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Reviews And Injuries

The game stops while officials review a play on replay. Injuries can also cause long stoppages, especially if a player needs medical attention on the field.

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Which Quarters Take The Longest?

The second and fourth quarters often take the longest. Both end a half, so teams are more likely to use timeouts and manage the clock.

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College Football Vs The NFL

College quarters are also 15 minutes, but college games usually take longer overall. Different clock rules and a longer halftime both play a part.