[stonyloam]

Hi Cyrll: We often talk about aquarium size by volume (US gal.), because it has been pretty much standardized over the Years. Probably because they can be very heavy and need a sturdy (often steel) tank stand and having standardized dimensions for tanks makes it easier for the manufacturers. I put together a little table below. The weights are for a tank filled with water. When you go to the shop you can just ask for a "20 gal long" and know that you will get a 30x12x12 tank and it will fit a "20 gal long" stand. Hope this helps a little.

2.5 gallon............. 12" x 6" x 8" .......27 lbs
5 gallon ................16" x 8" x 10"..... 62 lbs
10 gallon Leader ....20" x 10" x 12" ..111 lb
15 gallon ...............24" x 12" x 12" ..170 lbs
15 gallon High ........20" x 10" x 18" ..170 lbs
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 Breeder ....36" x 18" x 12" ..348 lbs
40 gallon Breeder.....36" x 18" x 16" ..458 lbs
40 gallon Long ........48" x 12" x 16" ..455 lbs
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