To know how much water you will need simply follow these simple instructions and calculations:
Above Ground Rectangle And Round Pools: Length of pool x Width x Depth x 5.9 = Gallons needed
Above Ground Oval Pool: Length x Width x Depth x 7.9= Gallons needed
In Ground Pool Length of pool x Width x Depth x 7.5= Gallons needed
(Note: Average Depth = shallow end + deep end divided by 2)
If there are two different depths take the shallow end plus deep and divide by two to get the depth. The depth is measured in feet not inches.