You have an aquarium tank of one of the following shapes (rectangle, trapezium, bow front, triangle, 4 sides) and - based on its measurements - you want to quickly calculate :
   its capacity in gallons, liters or american gallons
   dosing needed e.g. for  medical doses
   heating power needed in watts
   its weight in kg or lbs.

Well, just download the following freeware, called "Tank calculations" as a 525 kB zip file called '" and offered to you for free by Lake Tanganyika Fisheries Research in association with "" from where you can download the file. Right click here or on the aquarium picture above to download the '" file.