In an Olympic-size swimming pool that is 50 meters long, it takes just over 4.5 laps to swim 500 yards. One length of the pool is just over 54.68 yards. Two lengths of a pool equal a lap.
The 50-meter length of Olympic size pools is used in the Olympics and is known as long course swimming. In short course swimming, competition pools are 25 meters long. Competitions must use distances of either 25 or 50 meters between touch panels to qualify for recognition by the Fédération Internationale de Natation, which administers international swimming events. When touch panels are used, Olympic pools typically are slightly longer than 50 meters to provide additional room for the panels.