Aquarium Sizes and Weights

Young girl looking in fish tank
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Do you have a used aquarium that you don't have size information for? Or perhaps you want to know how much your tank will weigh once it's filled with water. If so, this chart should answer your questions.

The size and weight information is included for many of the basic aquarium sizes. For more details on how much substrate you will need or filter sizes, check this article on recommended equipment needs.

Basic Aquarium Sizes (U.S. Units of Weight & Measure)

Note: Weights are for glass aquariums. Acrylic aquariums will weigh less.

SMALL AQUARIUMS
(not recommended for beginners)
Tank SizeL x W x HEmpty WeightFilled Weight
2 1/2 gallon12" x 6" x 8"3 lbs27 lbs
5 gallon16" x 8" x 10"7 lbs62 lbs
10 gallon "Leader"20" x 10" x 12"11 lbs111 lbs
15 gallon24" x 12" x 12"21 lbs170 lbs
15 gallon High20" x 10" x 18"22 lbs170 lbs

MID-SIZED AQUARIUMS
Tank SizeL x W x HEmpty WeightFilled Weight
20 gallon High24" x 12" x 16"25 lbs225 lbs
20 gallon Long30" x 12" x 12"25 lbs225 lbs
25 gallon24" x 12" x 20"32 lbs282 lbs
29 gallon30" x 12" x 18"40 lbs330 lbs
30 gallon Breeder36" x 18" x 12"48 lbs348 lbs
40 gallon Breeder36" x 18" x 16"58 lbs458 lbs
40 gallon Long48" x 12" x 16"55 lbs455 lbs

LARGE AQUARIUMS
Tank SizeL x W x HEmpty WeightFilled Weight
50 gallon36" x 18" x 19"100 lbs600 lbs
55 gallon48" x 13" x 21"78 lbs625 lbs
65 gallon36" x 18" x 24"126 lbs772 lbs
75 gallon48" x 18" x 21"140 lbs850 lbs
90 gallon48" x 18" x 24"160 lbs1050 lbs
125 gallon72" x 18" x 21"206 lbs1400 lbs
150 gallon72" x 18" x 28"338 lbs1800 lbs
180 Gallon72" x 24" x 25"338 lbs2100 lbs