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With that out of the way.

I’ve often been found walking around my local fish store thinking how heavy those large display aquariums weigh? This got me thinking that many of you might be wondering the same thing.

So I did some research to find out some common sizes and weights of aquariums and I put it all together in a neat little chart so you have something to reference when you are about to pick up your first aquarium.

Here’s the chart;

Aquarium Sizes Chart (Dimensions And Weight)

SMALL AQUARIUMS
Tank Size L x W x H Filled Weight
2 1/2 gallon 12″ x 6″ x 8″ 27 lbs
5 gallon 16″ x 8″ x 10″ 62 lbs
10 gallon 20″ x 10″ x 12″ 111 lbs
15 gallon 24″ x 12″ x 12″ 170 lbs
15 gallon High 20″ x 10″ x 18″ 170 lbs

MEDIUM AQUARIUMS
Tank Size L x W x H Filled Weight
20 gallon High 24″ x 12″ x 16″ 225 lbs
20 gallon Long 30″ x 12″ x 12″ 225 lbs
25 gallon 24″ x 12″ x 20″ 282 lbs
29 gallon 30″ x 12″ x 18″ 330 lbs
30 gallon 36″ x 18″ x 12″ 348 lbs
40 gallon 36″ x 18″ x 16″ 458 lbs
40 gallon Long 48″ x 12″ x 16″ 455 lbs

LARGE AQUARIUMS
Tank Size L x W x H Filled Weight
50 gallon 36″ x 18″ x 19″ 600 lbs
55 gallon 48″ x 13″ x 21″ 625 lbs
65 gallon 36″ x 18″ x 24″ 772 lbs
75 gallon 48″ x 18″ x 21″ 850 lbs
90 gallon 48″ x 18″ x 24″ 1050 lbs
125 gallon 72″ x 18″ x 21″ 1400 lbs
150 gallon 72″ x 18″ x 28″ 1800 lbs
180 Gallon 72″ x 24″ x 25″ 2100 lbs

The above information is for most standard glass aquarium sizes and weights. If you are considering an acrylic tank, they are available in many of the same sizes, they will just weigh a little less.

One thing to keep in mind is that as glass aquariums get larger the thickness of the glass increases, which is why the weight of the aquarium can get very heavy.

Acrylic on the other hand is lighter and stronger than glass which is why some go for an acrylic aquarium when they get to the larger sizes. However, it’s important to note that Acrylic scratches very easily.

Further Reading: If you’re sick of reading the old complicated beginner guides then check out our guide: Best Freshwater Aquarium Setup. Check it out!