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?
I'm assuming you mean 30 feet diameter (from one side to another)? In that case:
Calculate the volume of the cylinder (a round pool is a cylinder) using
r = radius, which is half the diameter or 15ft = 15*12 = 180 inches
h = 54 inches
pi = 3.1415
180 * 180 * 54 * 3.1415 =5,496,368 cubic inches
1 gallon = 231 cublic inches
so 5,496,368 / 231 = 23,793 gallons.
When filled to 80% water capacity, as recommended, the pool holds approximately:
10'x30" = 915 gal
12'x30" = 1,353 gal
12'x36" = 1,722 gal
15'x36" = 2,561 gal
15'x42" = 3,110 gal
16'x42" = 3,896 gal
18'x36" = 3,735 gal
18'x42" = 4,814 gal
18'x48" = 5,593 gal
24'x48" = 10,103 gal
10,000 gallons
About 28,913 gallons of water.
23,800 gallons.
5,287.7 gallons of water.
If you fill it to four feet deep, the total is 10,408 gallons of water.
You will need a maximum of 11,230 gallons of water.
4,625.6 gallons.
To fill it all the way to the top you'll need 18,502.4 gallons of water.
Three feet of water in a 12-foot round pool is about 2,550 gallons.
Twelve feet of water in a 10-foot round pool is approximately 7,080 gallons.
If this is a round pool 18 feet across and you fill it with 4 feet of water, it contains 7,646 gallons of water.
Exactly 5264.1669 gallons
An 18-foot round pool with 3 feet of water contains 5,734.8 gallons of water. If you fill it to 4 feet deep it increases to 7,646 gallons of water.
To fill in this size pool you'll need 100.5 cubic yards of material. If you mean how many gallons of water to fill the pool, you'd need 20,300 gallons of water to fully fill it.
A pool this size with an average depth of 16 feet requires 462,560 gallons of water to fill it to the top.