bobbie36 wrote:if a tank is 4'x4'x5' what would be the total liquid volume in gallons
1 cu ft = 1728 cu in
and 1 US gallon = 231 cu in.
If those are inside dimensions
4' x 4' x 5' = 80 ft^3
80 ft^3 x 1728 in^3/ft^3 x 1 gallon/231 in^3 = 598.4 gallons.
If they are outside dimensions, you need to allow for wall thickness.