How many gallans of water in an 18ft round 4 foot deep above ground pool?

To calculate the volume of water in an 18-foot round pool that is 4 feet deep, you can use the formula for the volume of a cylinder: V = πr²h, where r is the radius and h is the height. The radius (r) is half the diameter, so for an 18-foot pool, the radius is 9 feet. Plugging in the values, the volume is approximately 508.94 cubic feet. Since 1 cubic foot equals about 7.48 gallons, the pool holds roughly 3,800 gallons of water.