 # Conversions Useful for a Freshwater Aquarium

Using and transforming measuring units / metric systems can be difficult for those who are not that good with mathematics and physics. That’s why some lists with useful conversions can be of a real help for freshwater aquarium keepers. As you found out reading and learning on books or over the internet, aquarium specialists come from all over the world and they are using different measuring units / metric systems for explaining different aspects regarding the aquariums. It’s pretty easy to use all these advices using conversions as it suits your knowledge.

For measuring the volume of water you want to pour inside the tank you can use:
1000 cubic centimeters = 1 liter
1 liter of water = 1 kilogram in weight
1 cubic foot of water = 6.23 imperial gallons
1 imperial gallon of water = 10 pounds in weight
1 U.S. gallon = 8 imperial gallons
1 imperial gallon = 4.55 liters
One liter = 0.26 gallons
One gallon = 3.78 liters
Also, you should know that the volume of the tank is calculated using the following formula:
Volume = Length × Width × Height

For measuring water hardness you can use:
1 English degree of hardness = 14.3 ppm (parts per million) of calcium carbonate
1 French degree of hardness = 10.0 ppm of calcium carbonate
1 American degree of hardness = 17.1 ppm of calcium carbonate
1 German degree of hardness = 17.9 ppm of calcium oxide

For measuring length you can use:
1 inch = 2.54 centimeters
One foot = 30 centimeters
One yard = 36 inches
One meter = 39.4 inches

For measuring weight you should know that:
One ounce = 29 grams
Capacity in gallons = (Length × Width × Height) / 231 (L, W, H measured in inches)
One gallon of fresh water at 4 degrees Celsius = 8.57 pounds of weigh.

For measuring temperature you should know that:
Celsius = (Fahrenheit – 32) × 5/9
Fahrenheit = (Celsius × 9/5) + 32

Conversions that you might also find useful are:
- Converting centimeters to inches, multiplying by 0.40;
- Converting inches to centimeters, multiplying by 2.54;
- Converting kilograms to pounds, multiplying by 2.2;
- Converting pounds to kilograms, multiplying by 0.453.

Well, these conversions useful for a freshwater aquarium are going to get you out of the problems when looking for an information regarding aquariums.