First calc Total Gal in the top 1 ft. 480 sf x 1 ft deep = 480 ft3 div by 12 (12" in the top 1 ft). 40 ft3 in that top 1 in. 40 ft3 x 7.48 gal/ft3 = 299.2 gal in that 1"
30.55 gallons (rounded) for every inch the water in the tub is deep.
21.76 US gallons of water.
359 gallons for every inch the water is deep.
27,154
You will need a maximum of 11,230 gallons of water.
10,408 US gallons.
3360
1 acre = 43560 sq.feet. 1 foot deep water over an acre is 43560 cubic feet, which is 325851.4 gallons in 1 foot deep. If it is 1 inch deep (1/12 foot) then it is 27154.3 gallons in 1 inch deep.
This pool holds a maximum of 18,560 gallons of water.
94
It depends on the depth of the water. Assuming the water in one inch deep, there would be about 13,577 gallons of water in the half acre.
a 27 foot round by 52 inch deep pool holds 18,550 gallons of water