Aquarium Calculator

Calculate the volume of the aquarium in liters and the weight of the water based on dimensions and fill height.

✅ Free 📅 Updated 5.11.2026 🏠 Construction Calculator

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About this calculator

What is the Aquarium Calculator?

The Aquarium Calculator calculates the volume of the aquarium in liters and the weight of the water based on dimensions. You need to know the volume when dosing medications, filters, and heaters.

The calculator is free, works in the browser without registration, and shows the result as soon as you change the values. The calculation is done on your device, and the information you enter is not sent anywhere.

Formula and Calculation Principle

Volume in liters = length × width × height (cm) / 1000 × fill level. One liter of water weighs about 1 kg.

Practical Example

A 100 × 40 × 50 cm aquarium contains 200 liters. At 90 percent fill, there are 180 liters of water, which weighs 180 kg. With default values, the calculator gives the result: Water volume 180 liters.

Who is the calculator suitable for?

For aquarium buyers and owners who want to check the load capacity of the equipment as well as the sizing of the filter and heater.

Tips and Considerations

  • Add about 20–30% to the estimate for weight safety.
  • Size the filter so that it circulates 4–6 times the volume per hour.
  • Check the load capacity of the equipment before filling.


Frequently Asked Questions