Tropical freshwater aquarium fish

Length calculator

Inches to centimeters

Centimeters to inches

Temperature calculator

Fahrenheit to Centigrade

Centigrade to Fahrenheit

Water hardness conversion

dKH (dGH) to Parts per Million

dKH (dGH) to Milliequivalents per liter

Parts per Million to dKH (dGH)

Milliequivalents per liter to dKH (dGH)

Parts per Million to Milliequivalents per liter

Milliequivalents per liter to Parts per Million

Liquid measurement conversions

US Gallons to Litres

Litres to US Gallons

UK Gallons to Litres

Litres to UK Gallons

US Gallons to UK Gallons

UK Gallons to US Gallons

Advanced calculator for the number of fish in an aquarium

Not sure how many fish to keep in your tank? Use this tool for the rectangular tank type.

Select units, please...

centimeters inches

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

If your aquarium is of cylindrical type, use the following tool for your calculations.

centimeters inches

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