10 Gallon Fish Tank Dimensions (Size)&mdashInches,cm

By Eddie Waithaka @aquariawise

10 Gallon Fish Tank Dimensions (Size)&mdashInches,cm

A 10-gallon is a perfect tank for small aquarium fish, such as betta, guppies, and tetras, and non-aquatic pets, like snakes, frogs, and lizards.

A standard, rectangular 10-gallon fish tank’s typical dimensions are 20 inches long (length), 10 inches wide (width), and 12 inches in height (tall), approximately 50.8 cm L, 25.4 cm W, and 30.5 cm H, and weights 11 Lbs empty, 111 Lbs filled with water.

The tank is enough for a single betta fish with plants or a group of tetras and guppies, but it is too small for a goldfish. It can accommodate a juvenile axolotl, but the fish will need more room in the future.

The same 10-gallon fish tank is big enough for 2 gerbils, a hamster, a leopard gecko, and a juvenile bearded dragon, but too small for a turtle (we will get back to this later).

What are The Dimensions of A 10 Gallon Fish Tank

As I mentioned earlier, the dimensions of a standard 10-gallon fish tank in inches are 20“ long, 10“ wide, and 12“ high

However, the exact dimensions may vary slightly depending on the specific brand and model of the fish tank, and it’s always a good idea to double-check the measurements before purchasing the tank or any accessories.

For instance, an Aqueon LED 10 Gallon Aquarium Kit is 22.88“ L, 12.75“ W, and 13.88 H“, while a Marina LED Aquarium 10 Gallon Kit measures 20.25“ L, 10.24“ W, 12.91“ H.

You will also find 10-gallon high (cube) fish tanks with dimensions different from the standard size. See, this Innovative Nuvo Fusion Pro 2 series is 11.8“ Long, 15“ wide, and 13“ High.

The shape of the 10-gallon fish tank varies the dimensions as well. For example, the Fluval Flex 9-Gallon Nano Glass Aquarium Kit is only a gallon less than a standard 10-gallon but because of its odd shape, its dimensions (13.19“L, 13.78“ W, 12.8“ H) vary widely from other 10-gallon kits.

Pretty sure the difference does not sound too significant, but it counts when trying to size your fish tank lids and stands.

Please also note that the outside dimensions of a 10-gallon varies from the display size. A Innovaive marine outside dimension is 11.8“L, 15“W, 13“H, but the display size is 11.34“ L, 11.38“ W, 13“ H.

Here is a table of popular 10-gallon fish tank kits and their exact dimensions.

10 Gallon Fish Tank BrandSize in Inches (“)Dimensions in cms
Aqueon LED 10 Gallon Aquarium Kit22.88“ L, 12.75“ W, 13.88 H“55cm L, 30cm W, 33cm H
Marina LED Aquarium Kit 10 Gallon20.25“ L, 10.24“ W, 12.91“ H50cm L, 25cm W, 30cm H
Penn Plax World Radius 10 Gallon Kit17.75“ L x 11.75“ W x 12.63“ H45cm L x 30cm W x 33cm H
Tetra Complete LED Aquarium 1022“L x 10“W x 12“H55 cm L x 25 cm W x 30 cm H
Water Box Aquarium Cube 1013.8“ L × 14.2“ W × 13.8“ H35cm L × 35cm W × 35cm H
Innovative Nuvo Fusion Pro 2 series11.8“ L x 15“ W x 13“ H30cm L x 38cm W x 33cm H
Fluval Flex 9-Gallon Nano Aquarium Kit13.19“ L x 13.78“ W x 12.8“ H33 cm L x 35cm W x 33cm H

How Many Gallons is A 20 X 12 X 10 Tank

A fish tank with dimensions 20“ x 12“ x 10“ is equivalent to a tank with dimensions of 1.67 feet x 1 foot x 0.83 feet (by dividing each measure by 12, the number of inches in one foot).

To calculate the volume of water that this fish tank can hold in gallons, you need to multiply the tank’s dimensions in feet and then multiply the result by 7.48 (the number of gallons in one cubic foot of water).

So the calculation would be:

Volume of the tank = 1.67 ft x 1 ft x 0.83 ft = 1.38 cubic feet Gallons in 1.38 cubic feet = 1.38 x 7.48 = 10.33 gallons

Therefore, a fish tank with dimensions 20“ x 12“ x 10“ can hold approximately 10 gallons of water.

Given the rule one inch of adult fish per gallon of water, based on the calculations above, your tank can hold upto 8 inches of adult fish in the tank.|

How Many cm (or Inches) Long is A 10 Gallon Fish Tank

A standard rectangular 10-gallon fish tank (Leader) is 50.8 cm (20) inches long. However, the length of a fish tank can vary depending on its shape and dimensions, with the range anywhere from 30 cm (14“) for an Innovative Nuvo Fusion Pro 2 series to 55 cm (22) for an Aqueon LED 10 Gallon Aquarium Kit.

How Big is A 10 Gallon Tank in Feet

To convert the size of a 10-gallon tank from inches to feet, we need to divide each dimension by 12 since there are 12 inches in one foot.

So for a standard rectangular 10-gallon fish tank, which has the dimensions of 20 inches (length) x 10 inches (width) x 12 inches (height), we get:

Length in feet: 20 inches ÷ 12 inches/foot = 1.67 feet

Width in feet: 10 inches ÷ 12 inches/foot = 0.83 feet

Height in feet: 12 inches ÷ 12 inches/foot = 1 foot

Therefore, the 10-gallon tank is approximately 1.67 feet (long) x 0.83 feet (wide) x 1 foot (high) in size.

Is A 10 Gallon Fish Tank Small or Big Enough for “X”

A 10-gallon tank is considered a small-size and may not be suitable for all types of fish. Some small fish species, such as guppies, tetras, and bettas, can thrive in a 10-gallon tank, provided they are not overcrowded. However, larger fish species, such as cichlids, goldfish, and angelfish, require much more swimming space and may not be suitable for a 10-gallon tank.

A 10-gallon tank may also be suitable for small-sized hamster or gerbil species, such as dwarf hamsters or pygmy gerbils but with plenty of enrichment, such as exercise wheels, tunnels, and hiding spots, to keep them active and stimulated.

Overall, a tank size of at least 20 gallons is recommended for most hamsters and gerbils, and larger tanks are always better if space and budget allow.

Here is a list of tiny pet you (or cannot) keep in a 10-gallon fish tank:

Some examples of fish that can be kept in a 10-gallon tank include:

—Betta fish


— Neon tetras

— Ember tetras

— Endler’s livebearers

— Cherry shrimp

— Otocinclus Catfish

Harlequin rasbora

Pea puffer

— White cloud mountain minnow

Some examples of small snake species that can be housed in a 10-gallon tank include:

— Kenyan sand boa

— Worm Snake

— Rough green snake

— African house snake

— Rubber boas

Some examples of small lizard species that can be housed in a 10-gallon tank include:

— Leopard gecko

— Crested gecko

— African fat-tailed gecko

— Anole Lizard

That’s all for this post.

Happy pet keeping.

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