Aquarium volume calculator is toward the bottom of the page. We have included many usefull calculators on this page for your convienance as well.

Aquarium volume calculator

Common Conversions
*Please note: The aquarium calculator and conversions on this page use javascript. It will only work if javascript is enabled in your internet browser.

Below you will find our aquarium calculator that you can use to convert back and forth between some of the most common conversions you'll encounter when running your fish tank as well as a tool to calculate aquarium size based on dimensions.

Currently, we have Fahrenheit to Celsius, Gallons to Liters, Inches to Centimeters (useful for determining fish species sizes), UK Gallons to US Gallons, and also a calculator to determine the total volume of your aquarium. Please not that the total tank volume figure computed is a rough estimate and only takes into account your fish tank dimensions. It does not take into account ornaments, decorations, the substrate, live rock, etc. These items can have an effect on the total volume of water in your aquarium. This calculation is simply based on an empty tank with the given dimensions.

*Numbers round up to two decimals places upon conversion.

Convert Fahrenheit to Celsius

Enter °F: = °C

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Convert Celsius to Fahrenheit

Enter °C: = °F

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Convert Gallons to Liters

Enter Gallons: = Liters

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Convert Liters to Gallons

Enter Liters: = Gallons

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Convert Inches to Centimeters

Enter Inches: = Centimeters

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Convert Centimeters to Inches

Enter Centimeters: = Inches

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Convert UK Gallons to US Gallons

Enter UK Gallons: = US Gallons

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Convert US Gallons to UK Gallons

Enter US Gallons: = UK Gallons

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Convert Meters to Feet

Enter Meters: = Feet

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Convert Feet to Meters

Enter Feet: = Meters

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Calculate Fish Tank Volume in Gallons Based on Tank Size

Fish Tank Length in Inches: Fish Tank Width in Inches: Fish Tank Height in Inches: Aquarium Size is US Gallons Aquarium Size is UK Gallons

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Convert Meq/L to dKH or PPM CaCO₃

Enter Meq/L: = dKH OR ppm CaCO3

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Convert dKH to Meq/L or PPM CaCO₃

Enter dKH: = Meq/L OR ppm CaCO3