180 gallon fish tank size and measurements
How big is a 180 gallon tank? It is about 6.0 feet long (72 in), 24 inches from front to back and 24 inches tall, so it needs a stand or space at least 72 x 24 inches.
- Outside dimensions
- 72 x 24 x 24 in182.9 x 61 x 61 cm
- Volume
- 180 US gal681 L, 150 UK gal
- Footprint
- 12.0 sq ft1,728 sq in
- Water weight
- 1,501 lb681 kg
Checked against the manufacturer's specs: the Marineland 180 gallon measures 72 x 24 x 24 in outside. The size above is the rounded standard size most charts use.
Measured from the outside, these dimensions hold about 179.5 US gallons. Real water volume is lower because of glass thickness, substrate, decor and the gap below the rim. Check the real figure with the aquarium volume calculator.
How much does a 180 gallon tank weigh?
A 180 gallon tank weighs about 1,701 lb of water and gravel, plus the glass, which varies by brand. Use a stand rated for the full weight, on a level floor. The fish tank weight guide compares every size.
How much gravel or sand for a 180 gallon tank?
| Bed depth | Gravel | Sand | Aquasoil |
|---|---|---|---|
| 1 in (2.5 cm) | 100 lb | 95 lb | 28 L |
| 2 in (5.1 cm) | 200 lb | 190 lb | 57 L |
| 3 in (7.6 cm) | 300 lb | 285 lb | 85 L |
Based on a 72 x 24 in floor and typical bulk densities.
Different depth? Use the aquarium substrate calculator.
Heater and filter size for a 180 gallon tank
A common rule is 3–5 watts per gallon, so a 180 gallon tank needs about 540–900 W: three 250 W heaters, spread along the tank suits most rooms. Use the higher end in cold rooms.
For filtration, aim to turn the water over 4–6 times an hour: a filter rated around 720–1080 gallons per hour.
Fish that suit a 180 gallon tank
- Large cichlids, depending on species
- Big schools of fast swimmers
- Large plecos and catfish suited to the size
- Reef or large fish-only marine setups
Starting ideas only. Check each species' adult size, temperament and water needs before buying.
Compare nearby sizes
- Next smaller: 150 gallon, 72 x 18 x 28 in
- Next larger: 210 gallon, 72 x 24 x 29 in
See every size in the aquarium size chart.
Frequently asked questions
What are the dimensions of a 180 gallon tank?
A standard 180 gallon aquarium measures about 72 x 24 x 24 inches (182.9 x 61 x 61 cm), length x width x height. Brands vary by a fraction of an inch.
How long is a 180 gallon tank?
About 72 inches (182.9 cm), or 6.0 feet.
How big is a 180 gallon tank?
It is about 6.0 feet long, 24 inches deep and 24 inches tall, and takes up 12.0 square feet of floor.
How much does a 180 gallon tank weigh when full?
About 1,701 lb of water and gravel, plus the glass, which varies by brand.
How much gravel do I need for a 180 gallon tank?
For a 2 inch bed, about 200 lb of gravel or 190 lb of sand.
What size heater does a 180 gallon tank need?
About 540–900 watts in total, so three 250 W heaters, spread along the tank suits most rooms.
Last updated .