Water Tank Capacity Calculator
Work out the capacity of a round water tank from its diameter and height. The answer is in litres, so you can compare tanks or plan rainwater storage.
8 of 8 free uses remaining today
Work out the capacity of a round water tank from its diameter and height. The answer is in litres, so you can compare tanks or plan rainwater storage.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (diameter = 2.4 m, height = 2 m), the results are: capacity 9,048 L.
Quick reference: diameter vs result
Reference table based on the example values; it is not your calculation result.
| Diameter (m) | Capacity |
|---|---|
| 1.2 | 2,262 L |
| 2.4 | 9,048 L |
| 4.8 | 36,191 L |
| 12 | 226,195 L |
| 24 | 904,779 L |
| 48 | 3,619,115 L |
Frequently asked questions
What formula does this calculator use?
Capacity = pi × (d ÷ 2)^2 × h × 1000. Variables: d = diameter in m, h = height in m.
What do I need to enter?
You need diameter (m), height (m). Results update as you type.
What is an example result?
With the default inputs (diameter = 2.4 m, height = 2 m), the results are: capacity 9,048 L.
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