###### Asked in Swimming PoolsPool Building and RepairPool Care and Cleaning

# How many gallons of water does it take to fill a 30' x 54 round above ground pool and what is the formula to figure it out?

## Answer

###### Wiki User

###### July 04, 2005 3:26PM

Look, this is simple geometry...look it up...stop playing games, you need to know some of this stuff. I really must insist! Any Way.... Total Volume of a cylinder is Radius Squared, times PI, times Height of Cylinder. 180 inches(the radius) times itself(that's Squared) times PI (Pi is 3.14) gives you the total area of a circle. The Area multiplied by the Height gives you the volume.Thus...(PI)r2 x H = V Good Lord... You do the Math. Recommend. http://library.thinkquest.org/20991/geo/solids/html The first response will get you the volume of the pool in cubic inches, but not gallons. 15 foot radius squared times Pi = 706.5 sqft. Assuming that the x 54 means 54 inches deep, that's 4.5 feet and 706.5 times 4.5 = 3179.25 cubic feet. There are approximately 7.5 gallons in a cubic foot, so 3179.25 times 7.5 = 23,844.375 gallons. Thanks for the assist, I sort of forgot about the actual question; How many gallons?