That is 39.868 US gallons.
A 15 cubic foot tank will hold a maximum of about 112.2 gallons of water.
Multiply the number of cubic feet in the tank by 7.5 to find gallons.
A 1,000 cubic foot tank holds up to 7,480 US gallons of water.
1 cubic foot = 7.48051948 US Gallons = 6.22883288 Imperial Gallons Therefore, 1000 cubic feet = 7480.51948 US Gallons = 6228.83288 Imperial Gallons
A 14 foot diameter tank has a volume of 154 cubic feet per foot of height and it takes 7.48 gallons per cubic foot7.48 * 154 = 1150 gallons per foot of height
80 cu. ft. = 598.4415 gallons.
An 18X18x47 foot tank holds 113,913.35 US gallons.
20 x 10 x 5 = 1000 cubic ft. tank capacity. There are 7.48052 U.S. gallons in a cubic foot. The tank will hold 7.48052 x 1000 = 7480.52 U.S.gallons. (Or approx. 6228.8 Imperial gallons because they are bigger in volume). (There are 6.2288 Imperial gallons in a cubic foot).
A 334.2 cubic foot tank.
If the tank is a cylinder, 72 feet in diameter and 4 feet deep, that works out to 121,827.862 U.S. gallons. 1 U.S. gallon is exactly 231 cubic inches, so a cubic foot is about 7.48 gallons.
A cubic Foot is 7.48 Gallons so say it is 7.5 Gal that makes 5 gallons about .67 Cubic Foot
36 cubic feet of water at 6.229 gallons/ cu ft = 224.2 gallons