# How much does a 20 gallon fish tank weigh ?

We have check some 20 gallon fish tank in our article most of them are in this two dimension.

**24″ x 12″ x 16″ (Dimension)**

- Empty weigh is – 25 lbs
- Filled weigh is – 225 lbs.

**30″ x 12″ x 12″ (Dimension)**

- Empty weigh is – 25 lbs
- Filled weigh is – 225 lbs.

Also, these tanks aren’t that big, which makes them difficult to clean. This is important because many people new to aquariums quickly find it difficult to keep up with maintenance.Overall, medium tanks are a manageable size.

In addition to simple rectangles, aquariums can also be hexagonal, pentagonal and even cylindrical in shape. When you buy such a tank, you are already given the capacity in gallons and you can use the chart above to calculate the empty and full weight of the tank. A 50-gallon tank, whether rectangular, hexagonal, or cylindrical, has the same weight measurements.

However, if you have purchased or acquired a used tank but do not know the gallon size, calculating the tank volume and weight in gallons is really just a matter of calculating the volume in cubic inches. The most important measures to know

**230 cubic inches = 1 gallon of water**

If the volume of the tank can be determined by cubic inches, it is easy to convert it to gallon capacity. Once the gallon capacity is determined, use the above chart to estimate the empty weight and total weight of the tank.

To determine the volume, some calculations are required. The volume of the tank is determined by first requesting the area of the basic shape in a square inch and then increasing the height. The easiest way to do this is to sketch the base shape and then divide into a shape that can be easily calculated. For example, a hexagon can be divided into square and triangles. Calculate the area of each shape with inches and calculate the area of the base shape of the tank. Put the height of the tank on this number and calculate the total volume with cubic inches. Next, the total volume of the cubic inch unit is divided by 231 to find the gallon capacity of the tank. Finally, see the table above for the same gallon capacity to determine the approximate weight of the tank.