# Fish Tank Sizes

URL: https://buzzle.com/animals-pets/fish-tank-sizes
Category: Animals & Pets
Published: 2010-02-26T00:28:00
Updated: 2026-08-19T03:32:43
Image: https://buzzle.com/_astro/fish-tank-sizes.De7-bnSp_1f1om6.webp
An aquarium gives a very lively look to a living room. These days there are various sizes available in the market, if at all you wish to set up a tank for your pet fish. Read more and learn which size will be the best for you.

The sight of beautiful fish swimming in a natural background is a very relaxing experience. Watching bright and slimy fish glide through decorated water is much more than a pastime for many of us. Keeping and maintaining a fish tank at home has become an obsession for some. There are many advantages, like less attention and care in case of aquarium fish as pets, which attract people towards setting one at their home. But, which are the most appropriate sizes? It is important to have proper knowledge, as fish also need their space.

### What is the Perfect Fish Tank Size?

The size of a fish tank is calculated in gallons―with respect to the maximum volume of water it can hold. There is no particular size which can be called ‘perfect’. Fish tanks are available in sizes starting with a small pot of 2 gallons to a mammoth 200 gallons. But, if you want to set up one for yourself, does it alone give a clue what exact shape or dimension we are talking about? Definitely not. We need to describe the sizes more elaborately. Here is a complete list of basic aquarium sizes:

**SMALL**

**Size**

**Dimensions (L x W x H)**

**Weight When Full**

2½ gallons

12″ x 6″ x 8″

27 lbs

5 gallons

16″ x 8″ x 10″

62 lbs

10 gallons

20″ x 10″ x 12″

111 lbs

15 gallons

24″ x 12″ x 12″

170 lbs

15 gallons (high)

20″ x 10″ x 18″

170 lbs

**MEDIUM**

**Size**

**Dimensions (L x W x H)**

**Weight When Full**

20 gallons (high)

24″ x 12″ x 16″

225 lbs

20 gallons (long)

30″ x 12″ x 12″

225 lbs

25 gallons

24″ x 12″ x 20″

282 lbs

30 gallons

30″ x 12″ x 18″

330 lbs

40 gallons

36″ x 18″ x 16″

458 lbs

40 gallons (long)

48″ x 12″ x 16″

455 lbs

**LARGE**

**Size**

**Dimensions (L x W x H)**

**Weight When Full**

50 gallons

36″ x 18″ x 19″

600 lbs

55 gallons

48″ x 13″ x 21″

625 lbs

65 gallons

36″ x 18″ x 24″

772 lbs

75 gallons

48″ x 18″ x 21″

850 lbs

90 gallons

48″ x 18″ x 24″

1050 lbs

125 gallons

72″ x 18″ x 21″

1400 lbs

150 gallons

72″ x 18″ x 28″

1800 lbs

180 gallons

72″ x 24″ x 25″

2100 lbs

  
These are the various sizes available these days for a usual fish tank. Although we have only discussed the highly popular rectangular shape only, spherical shapes are also found frequently. However, rectangle shaped aquariums are the easiest to maintain, and will remain most popular.