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Aquarium calculator

This page offers calculators that help with stocking a tank and also help with conversions. Conversions are automatic, values are being calculated as you type to the boxes. Feel free to use the following shortcuts to navigate within the calculator:


Inches to centimetres

Centimetres to inches


Celsius to Fahrenheit

Fahrenheit to Celsius

Water hardness

dKH (dGH) to Parts per Million

dKH (dGH) to Milliequivalents per liter

Parts per Million to dKH (dGH)

Parts per Million to Milliequivalents per liter

Milliequivalents per liter to dKH (dGH)

Milliequivalents per liter to Parts per Million


Litres to US Gallons

Litres to Imperial gallons

US gallons to Litres

US gallons to Imperial gallons

Imperial gallons to Litres

Imperial gallons to US gallons

Number of fish, wattage and lighting

A rectangular type of tank

Select units, please.

Enter the dimensions into the following input boxes (height x width x length), please.

x x

A cylindrical type of tank

Select units, please.

Enter the dimensions into the following input boxes (height x diameter), please.


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