A lot.
If you know the depth of the pool, you can actually calculate the volume in cubic feet. Then multiply by 7.48 (the number of gallons per cubic foot) to determine the amount of water in your pool.
For example, assuming the average depth of your pool is 5', the volume in cubic feet is (16'x36'x5') 2880, which is 21,542 gallons (2880 x 7.48).
615,142 gallons of water are needed to fill this cylinder.
48,000 gallons of water
You need 13 yrd's of fill
13300 gal of water can fill WHAT? 13,300 gallons of water will fill a 14'x28' pool that's 3 1/2' to 8 1/2' deep.
It will take 5,104.1 gallons of water to fill this cylinder.
You will need 17.5 square meters of water (17.5 tonnes) to fill it fully. The conversion to gallons depends on whether your talking about UK gallons or US gallons. That equates to 3850 UK gallons or 4623 US gallons. Hope this helps
It would require 2,937.6 US gallons of water to fill the pipe.
15000 gallons
2 gallons
To fill this pool to the very top you'll need about 1,480 gallons of water - less if you do not fill it all the way up.
5,287.7 gallons of water.
Aproximately 12,000 gallons