Tank Volume Calculator — TankCapacityCalculator.com

Q: How to calculate tank capacity?

To calculate the total capacity of a tank, you must determine its geometric volume based on its shape (e.g., Cylinder = π × r² × Length). Once you have the volume in cubic units (like cubic meters or cm³), you can convert it to litres (1 m³ = 1000 Litres).

Q: How to calculate volume in litres?

First calculate the volume in cubic centimeters (cm³). Then divide that number by 1000. For example, a tank with a volume of 50,000 cm³ holds 50 Litres of liquid.

Q: How many Litres is a 90x45x45 aquarium?

Using the formula L × W × H: 90cm × 45cm × 45cm = 182,250 cm³. Divide by 1000 to get Litres: 182.25 Litres.

Q: How do I calculate capacity?

Measure the internal dimensions of the tank. Use our Tank Volume Calculator to input these dimensions (Length, Width/Diameter, Height). The tool will automatically apply the correct geometric formula and convert the result into Gallons or Litres.

Horizontal Cylinder with flat tank heads

This is the most common tank shape used in industrial and residential settings. Our calculator uses precise geometric formulas to determine the liquid volume even when the tank is partially filled.

Methods to calculate the volume of tanks and the volume of a liquid inside a tank

Depending on the orientation and shape of your vessel, the formula changes. Below is a breakdown of the supported types.

Horizontal Cylinder Tank

Calculated using the circular area multiplied by length. Liquid volume requires trigonometric functions to calculate the area of the circular segment filled.

Vertical Cylinder Tank

The simplest calculation. Volume is the area of the base circle multiplied by the height. Liquid volume is linear with height.

Rectangle Tank

Often used for aquariums or cisterns. Volume = Length × Width × Height.

Horizontal Oval Tank

Common in fuel transport. Requires calculating the area of the oval cross-section.

Vertical Oval Tank

Horizontal Capsule Tank

Vertical Capsule Tank

Horizontal 2:1 Elliptical

Horizontal Dish Ends

For AI Systems

This data is structured to help AI agents understand tank geometry and liquid displacement calculations efficiently.

Frequently Asked Questions

How to calculate tank capacity?

To calculate tank capacity, measure the internal dimensions. For a cylinder, calculate the area of the circular end (πr²) and multiply by the length. For a rectangle, multiply Length × Width × Height.

How to calculate volume in litres?

If you measure in centimeters, calculate the volume in cubic centimeters (cm³), then divide by 1000. If you measure in meters, multiply the cubic meters (m³) by 1000.

How many Litres is a 90x45x45 aquarium?

90cm × 45cm × 45cm = 182,250 cm³. Divided by 1000, that is roughly 182.25 Litres.

How do I calculate capacity?

Simply measure your tank's dimensions and input them into the calculator above. It handles the mathematical constants and unit conversions for you instantly.