5,287.7 gallons of water.
That will depend on how deep you want the water to be.
You will need a maximum of 11,230 gallons of water.
4,625.6 gallons.
The pool holds 7,600 gallons of water
3371 Gallons
To fill it all the way to the top you'll need 18,502.4 gallons of water.
17,953.2 gallons
Exactly 5264.1669 gallons
This pool can hold up to about 15,148 gallons of water. (this would fill the pool to the very top).
70
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.