2x2x8 plus 9 is 41.
3.246753 gallons
About 7,100 gallons of water.
26700 gallons
It depends how deep it is.
Approx 4788 US gallons.
84.16 US gallons
You didn't mention shape, however if a rectangle it would be approximately 7,300 gallons
Based on a rectangle. approx 20,250 gallons
The volume of the rectangle would be 16*12*34 = 6528 cubic inches. 1 cubic inch = .004 gallons so 6528 cubic inches would be .004 * 6528 = 26.112 gallons.
Assuming it is a rectangle, 56.232 imperial gallons
This pool can hold up to about 7,181 gallons of water.