How many cubic feet in 1 gallon water?
0.1337 cubic feet in one gallon of water.
Assuming all the water becomes steam in that 1 minute: 1 gallon = 0.13368 cubic feet and the volumetric expansion of water into steam is 1675. Therefore 1 gallon of water will produce 1675 x 0.13368 = 223.914 cubic feet of steam. Which would also be 223.914 cubic feet per minute since the water is evaporated in 1 minute.
Based on the calculations in the related question (How many cubic feet of water vapor equals 1 pound?) using the Ideal Gas Law, 1 pound of water will be 27.24 cubic feet at 1 atmosphere pressure and 100Â°C (212Â°F). 1 gallon of water is 8.3454 pounds, so at the temperature 212Â°F and 1 atmosphere pressure, 1 gallon will generate 227.33 cubic feet.