Volume of a 120 x 45 x 45 cm Aquarium
A 120 x 45 x 45 cm fish tank holds approximately 243 litres of water.
How to use this tool
- Measure the internal length, width, and height of your tank.
- Enter the water fill height (not the tank height).
- The volume is shown in both litres and US gallons.
A 4-foot tank is a popular upgrade for hobbyists — find the total water volume to plan filtration and stocking correctly.
Frequently asked questions
- Why does the volume differ from what's printed on my tank?
- Manufacturers typically quote gross (external) volume. Internal dimensions and the actual water fill level are smaller, giving a lower real volume. Always use your own measurements for accurate dosing.
- How do I convert litres to US gallons?
- Divide litres by 3.785 to get US gallons (1 US gallon = 3.785 L).