need to know how LONG it is.
If the water is 6 ft wide and 18 inches deep, then there are
5.61 gallons of water for every inch of length.
30.55 gallons (rounded) for every inch the water in the tub is deep.
The aquarium would have a volume of 2200 cubic inches. One cubic inch is 0.0043290 liquid gallons, so 2200*0.0043290 = 9.52381 gallons.
6.23377 US gallons.
Approx 3437 Imperial gallons.
A round pool 30 feet wide and 52 inches deep can hold a maximum of 22,700 gallons of water.
16 and 7/8
There are about 33.7 gallons in a 3' by 1' by 1'6" aquarium.
There are 27,154 gallons of water in one acre of land that is one inch deep.
At 7.48 gallons per cubic foot that is 3.14x30x30/4x52 x7.48 /12 = 22,900 gallons
10.38961 gallons (rounded)
19.64 US gallons.
Assuming the dimensions given are inside dimensions, the cylinder will hold 55.75 gallons - less if the dimensions given are outside dimensions.