How many gallons of water fill an 18 x 36 swimming pool?
mine is the same size as long as its 3 feet deep to 8 feet deep then the exactly 26730 gallons i figured that out today because we over shocked our pool by 4 times
Assuming you are referring to an 18 foot by 3 foot (36 inches) circular pool, the formula would be PIE x radius x radius x depth = cubic feet, then cubic feet x gallons per cubic foot. So here is the answer.... 3.14 x 9 x 9 x 3 = 763.02 cubic feet, then 763.02 x 7.48 (gallons per cubic foot), = 5707.39 gallons.
Diameter = total length across
Radius = half of diameter
Cubic foot = 1' x 1' x 1'
7.48 = gallons per cubic foot
It depends on how deep you fill the pool. So, let's take the most common depths for a 33-foot round pool; 3, 4 and 5 feet: For 3 feet of water the total gallons will be about 19,275. For 4 feet of water the total gallons will be about 25,700. For 5 feet of water the total gallons will be about 32,125.