Cube Fish Tank Volume Calculator - Calculate volume in litres, gallons, cubic feet, bbl, cubic meters

Tank Volume (m³):

Tank Volume (U.S. Gallons):

Tank Volume (Imp. Gallons):

Tank Volume (Liters):

Tank Volume (Cubic Feet):

Tank Volume (bbl):

Cube Fish Tank Volume Formula

Volume Calculation

The volume of a cube-shaped fish tank is straightforward to calculate, given its symmetrical geometry. The formula is:

\[ V_{\text{tank}} = \text{length}^3 \]

Where:

length = Length of any edge of the cube

A cube-shaped tank is ideal for small aquariums due to its even distribution of volume. The tank's capacity is directly proportional to the cube of its edge length, making it easy to scale for different sizes.

For example, if the tank has an edge length of 50 cm, its volume is:

\[ V_{\text{tank}} = 50^3 = 125,000 \, \text{cm}^3 \]

This can be converted into liters (as 1,000 cm³ = 1 liter):

\[ V_{\text{tank}} = 125 \, \text{liters} \]

Factors to Consider:

Material thickness can slightly reduce the effective internal volume.
The tank must be filled to a safe level below the edge to prevent spillage.

How do I calculate the water volume if the tank is not filled completely?
If the tank is filled to a height less than the edge length, the volume is calculated as:

\[ V_{\text{filled}} = \text{length}^2 \cdot \text{filled height} \]

For example, if the edge length is 50 cm and the filled height is 40 cm:

\[ V_{\text{filled}} = 50^2 \cdot 40 = 100,000 \, \text{cm}^3 = 100 \, \text{liters} \]

What units should I use for length?
All dimensions should be in the same unit (e.g., centimeters or meters) to ensure the volume calculation is accurate. Convert the result to the desired unit of measurement (e.g., liters or cubic meters) afterward.

How does wall thickness affect the tank's effective volume?
If the walls are thick, the internal edge length is slightly reduced. For a wall thickness of t, the internal edge length becomes:

\[ \text{internal length} = \text{external length} - 2t \]

Recalculate the volume using the internal length for accuracy.

What is the largest fish that can fit in a cube tank?
The size of fish suitable for a tank depends on its swimming space and volume. Generally, allow at least 1 gallon (3.8 liters) of water per inch of fish length, considering the tank's actual capacity after decorations and equipment are installed.

Can a cube tank be used for saltwater fish?
Yes, but ensure the volume is adequate for maintaining water stability, and account for equipment like protein skimmers, which may take up space.