How many Gallons in 18ft pool?
Cannot be answered without knowing the length, width and depth.
shall assume the 18ft measurement is the diameter, not radius. 18ft = 5.486m = diameter 52in = 1.321m = depth pi x radius(squared) = area of the circle pi x 2.243(squared) = 15.8055 meters squared area x depth = volume in meters cubed 15.8055 x 1.321 = 20.879 meters cubed 1 meter cubed = 1000L 20.879 meters cubed = 20879L 20879L is: 5515.648 US Gallons 4592.738 UK Gallons
18ft = Circumference = 2*pi*radius -> radius = circumference/(2*pi) = 18/(2*3.14...) = 2.865 Volume of a cylinder = depth*pi*radius2 = 4ft*3.14...*2.8652 = 103.13 ft3 Google says that 1 cubic foot = 7.48051948 US gallons 103.13ft3*(7.4805gallons/ft3) = 771.46 gallons The volume of the pool is 771.46 gallons.
How do you figure out how much water it takes to fill a swimming pool that is 18 feet round and 4 feet deep?
It's a perfect circle? Is it 18ft across or 18ft around the edge? If it is 18ft across then the radius is 9 feet and the volume (amount of water needed) is going to be (pi)x (r squared)= 81pi which is about 254.469 square feet x 4 feet in height = 1018 cubic feet. A cubic foot is about 7.5 gallons so you need 7634 gallons of water to fill your pool. If it is…
Average Depth = Deep End (feet) + Shallow End (feet) divide by 2 Rectangular / Square Pool: Length (feet) x Width (feet) x Average Depth x 7.5 = Total gallons Circular Pool: Diameter x 2 x Average Depth x 7.5 = Total gallons Oval Pool: Max Length (feet) x Max Width (feet) x Average Depth x 7.5 = Total gallons Kidney Shaped Pool: Width of Shallow End (feet) + Width of Deep End (feet) x…