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Water, Tank & Plumbing Calculators

Cylindrical Tank Calculator

Capacity of a vertical or horizontal cylindrical tank, with the volume at any depth.

Enter values

Results update as you type.

Result

Full capacity

3,534.3 litres

In cubic metres
3.5343
Volume at that depth
1,767.1 litres
Percentage full
50%
In US gallons
933.66
Surface area
12.959 m²

About the Cylindrical Tank Calculator

Capacity of a vertical or horizontal cylindrical tank, with the volume at any depth.

Also known as: round tank volume, cylinder capacity calculator, drum volume, horizontal tank volume.

How to use this calculator

  1. Enter orientation, diameter, height or length, liquid depth.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

V = πr²L · horizontal fill uses the circular segment area

Worked example

Using the values pre-filled in the calculator above:

  • Orientation: Vertical
  • Diameter = 1.5 m
  • Height or length = 2 m
  • Liquid depth = 1 m

the calculator returns:

  • Full capacity: 3,534.3 litres
  • In cubic metres: 3.5343
  • Volume at that depth: 1,767.1 litres
  • Percentage full: 50%