Most basketball games follow rules established by FIBA, also known as the International Basketball Federation, which serves as the governing body for the majority of basketball regulations globally. In the United States, the NBA is affiliated with FIBA. FIBA exercises significant authority over all pivotal aspects of basketball, including the standard duration of a basketball game.
In the NBA and many other basketball leagues, a typical game comprises four quarters, each lasting approximately 12 minutes. This structure totals to about 48 minutes for a full NBA game. However, some European leagues opt for 10-minute quarters, resulting in a total game duration of 40 minutes.