Laps Per Mile: Calculate How Many Laps in an 18-Foot Round Pool
There are 5,280 feet in a mile. The circumference of a circle is pi multiplied by the diameter. The diameter of a 18 foot pool is 18 feet. So the circumference of the pool is pi multiplied by 18, or approximately 56.5 feet. So it would take approximately 5,280/56.5 or 93 laps to make a mile.