Volume = 29 x 21 x 9 = 5,481 cubic inches = 23.73 gallons (rounded)
If you mean inches, it can hold up to 6,739.95 gallons. If you mean feet, it can hold up to 11,646,630.24 gallons.
= 93.09 gallons (US) = 77.51 gallons (imperial)
This container could hold up to 3,949.71 US gallons of water.
About 47.6 gallons
The container has a volume of 4160 cubic inches (26x16x10). Assuming you are talking about gallons of water, it will hold 18 gallons (231 cu in per gallon).
44.88 gallons
18" x 18" x 16" = 5,184 cubic inches = 22.442 gallons (rounded) 1 gallon = 231 cubic inches
Assuming it is a rectangle, 8.485 US gallons
Figure the volume in cubic inches and divide by 277.4 to get the number of gallons the container will hold. This is A close approximate formular. Convert the gallons to pints or less if it is a small container.
74.42 gallons.
2.961 US gallons
The space inside that container is (32 x 27 x 6) = 5,184 cubic inches = 22.4416 gallons (rounded)