14 inches by 8 inches y 8 inches = 896 cubic inches.
896 cubic inches = 6.2222 cubic feet.
6.2222 cubic feet = 176.19308 litres
A fish tank would hold about 6 liters.
Making the assumptions that these measurements are in inches, and that the fish tank is a perfect cuboid, the volume of the fish tank is 49 x 19 x 21 = 19,511 cubic inches.Rounded to two decimal places, this is equal to 70.47 gallons.
A fish tank can hold all kinds of litres. -They come in many sizes, 6 litre is a fairly small one.
You are missing a measurement to obtain volume. A height it going to be needed.
16" x 48" x 21 inches is 16,128 cubic inches. One liter is 61.02 cubic inches. Therefore; 16,128 cubic inches = 16,128 / 61.02 = about 264.3 liters or about 70 US gallons.
14
72" x 32" x 13 inches is 29,952 cubic inches. One liter is 61.02 cubic inches. Therefore; 29,952 cubic inches = 29,952 / 61.02 = about 491 liters or about 130 US gallons.
60" x 48" x 23 inches is 66,240 cubic inches. One liter is 61.02 cubic inches. Therefore; 66,240 cubic inches = 66,240 / 61.02 = about 1085.5 liters or about 287 US gallons.
165
It will hold up to about 7.57 liters.
A gallon is approximately 3.78 Liters. Liters / 3.78 = GallonsTank size inches = (w x h x l) / 231 = Gallons
40 liters