It is estimated that 10 to 12 inches of snow melts to about 1 inch of water, which is 1/10 to 1/12 of its original volume.
1 cubic foot of snow would melt down to between 144 (12 x 12 x 12 / 12) and...
To convert cubic feet to gallons, multiply the number of cubic feet by 7.48 to calculate the number of US gallons, and by 6.23 to calculate the number of imperial gallons.