Answer: 50 meters

Olympic size pools measure: 50 metres – 164 ft long , 25 metres – 82 ft wide, and a minimum of 2 metres or 6 ft deep. An Olympic pool holds 2.500.000 liters or 660,430 gallons of water.

Usually, they attract international sportspersons and audiences. The race course length in these pools is 50 meters or 164 ft., commonly referred to as a long course.

Unlike the Olympic pool, other swimming pools are 25 meters long and accommodate a short course race. According to Fédération Internationale de Natation (FINA), if a competition decides to use touch panels, the pool must be 25 to 50 meters.