You will find that aquarium tanks are always described by their internal volume.
Tank size conversion chart
All gallons are US gallons which are smaller than UK gallons.
Aquarium Tank (US) | Width | Depth | Height |
2.5 Gallons | 12 in | 6 in | 8 in |
9.4 Litres | 30.48 cm | 15.24 cm | 20.32 cm |
5 Gallons | 16 in | 8 in | 10 in |
18.95 Litres | 40.64 cm | 45.72 cm | 25.4 cm |
10 Gallons | 20 in | 10 in | 12 in |
37.9 Litres | 50.8 cm | 25.4 cm | 30.48 cm |
15 Gallons | 20 in | 12 in | 12 in |
56.85 Litres | 50.8 cm | 30.48 cm | 30.48 cm |
15 Gallons High | 20 in | 10 in | 18 in |
56.85 Litres High | 50.8 cm | 25.4 cm | 45.72 cm |
20 Gallons High | 24 in | 12 in | 16 in |
75.8 Litres High | 60.96 cm | 30.48 cm | 40.64 cm |
20 Gallons Long | 30 in | 12 in | 12 in |
75.8 Litres Long | 76.2 cm | 30.48 cm | 30.48 cm |
25 Gallons | 24 in | 12 in | 20 in |
94.75 Litres | 60.96 cm | 30.48 cm | 50.8 cm |
29 Gallons | 30 in | 12 in | 18 in |
109.91 Litres | 76.2 cm | 30.48 cm | 45.72 cm |
30 Gallons | 36 in | 18 in | 12 in |
113.7 Liters | 91.44 cm | 45.72 cm | 30.48 cm |
40 Gallons | 48 in | 12 in | 16 in |
151.6 Litres | 121.92 cm | 30.48 cm | 40.64 cm |
40 Gallons | 36 in | 18 in | 16 in |
151.6 Liters | 91.44 cm | 45.72 cm | 40.64 cm |
50 Gallons | 36 in | 18 in | 19 in |
189.5 Litres | 91.44 cm | 45.72 cm | 48.26 cm |
55 Gallons | 48 in | 13 in | 21 in |
208.45 Litres | 121.92 cm | 33.02 cm | 53.34 cm |
65 Gallons | 36 in | 18 in | 24 in |
246.35 Litres | 91.44 cm | 45.72 cm | 60.96 cm |
75 Gallons | 48 in | 18 in | 21 in |
284.25 Litres | 121.92 cm | 45.72 cm | 53.34 cm |
90 Gallons | 48 in | 18 in | 24 in |
341.1 Litres | 121.92 cm | 45.72 cm | 60.96 cm |
125 Gallons | 72 in | 18 in | 21 in |
473.75 Litres | 182.88 cm | 45.72 cm | 53.34 cm |
150 Gallons | 72 in | 18 in | 28 in |
568.5 Litres | 182.88 cm | 45.72 cm | 71.12 cm |
180 Gallons | 72 in | 24 in | 25 in |
682.2 Litres | 182.88 cm | 60.96 cm | 63.5 cm |