You cannot convert a measure of area (square feet) to a measure of volume (gallons). Gallons is a measure of volume, or of 3 dimensions. You'd need cubic feet (not square feet) to convert it to gallons.
There are no gallons of water in a square foot. Gallons is a unit of volume, and square feet is a unit of area, not volume. If you are asking about cubic feet, however, the answer is there are about 7.5 gallons in a cubic foot.
Gallons is a measure of volume. Square feet is a measure of area. It's sort of like asking how many diet cokes are in a sheet of paper.
Just divide the number of gallons by the number of square feet.
None ... gallons is a measurement of volume, square feet is area not volume.
The amount (volume) of water is measured in gallons or cubic feet.
350
To discover the number of gallons of water in an 850 square foot pool, we'll need to know the depth of the pool. For a pool with 850 square feet and a known depth in feet, we'll find the volume by multiplying 850 ft2 by the depth in feet. With the answer in hand (and it will be in ft3 because we'll have a volume of water), we can find the number of gallons. There are about 7.48 gallons of water in a cubic foot. By multiplying our volume in ft3 by 7.48 (which is the conversion factor), we'll have discovered the volume of the pool in gallons.
approximately 6 square feet
100 gallons = 13.37 cubic feet.
40 square feet * 2 inches = 40*(1/6) = 6.66... cubic ft = 41.5 UK gallons or 49.9 US gallons (approx).
7.5
There are zero gallons in any number of square feet, as square feet have no distance in the tird dimension to qualify a volume.