Water Tank Capacity Table: Capacity by Length
Reference table of capacity for Water Tank Capacity across a range of length values — exact, engine-computed figures you can read off at a glance.
Water Tank Capacity Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Capacity
2,000
- Cubic metres
- 2.000
- US gallons
- 528
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Water Tank Capacity Calculator
The Water Tank Capacity Calculator works out your capacity, along with 2 related figures in an instant. Enter length, width and height and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the length.
- Enter the width.
- Enter the height.
- Read off your capacity, together with cubic metres and us gallons — the calculator updates automatically, with no button to press.
Formula
The Water Tank Capacity Calculator uses the formula:
Capacity = Length × Width × Height × 1000
Worked example
For example, with length of 2 m, width of 1 m and height of 1 m, the capacity is 2,000.
| Length | 2 m |
|---|---|
| Width | 1 m |
| Height | 1 m |
| Capacity | 2,000 |
|---|---|
| Cubic metres | 2.000 |
| US gallons | 528 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Multiply length × width × height in metres for cubic metres, then multiply by 1000 for litres. A 2 × 1 × 1 m tank holds 2,000 litres.
One cubic metre equals exactly 1,000 litres of water.
No, this is for rectangular tanks. For a round tank, use π × radius² × height instead, then convert to litres.
This gives the full geometric capacity. In practice, leave a little air gap at the top and account for inlet and outlet positions.
Enter the length. Enter the width. Enter the height. Read off your capacity, together with cubic metres and us gallons — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Water Tank Capacity: Formula, Steps & Examples
Learn how to calculate Water Tank Capacity — the formula explained step by step, with worked examples and a free calculator to check your answer.