Tank capacity calculator in litres
Metric-first: dimensions in centimetres or metres, output in litres with US gallons alongside. Same exact partial-fill geometry as the rest of the site.
Exact segment geometry — see methodology. Dished-head propane math is documented there too.
For household sizing — how many litres your family actually needs — use the IS 1172 household calculator. For converting an existing spec, litres ↔ gallons is exact: 1 US gallon = 3.785411784 L.
FAQ
How do I calculate tank capacity in litres?
Enter your tank's inside dimensions in centimetres (or switch to metres), pick the shape, and read litres directly. A vertical cylinder is π × (D/2)² × H; 1,000 cm³ = 1 litre.
What size is a typical Indian overhead tank?
Common polyethylene sizes are 500, 750, 1000, 1500 and 2000 litres — a 1000 L cylindrical tank is roughly 1.1 m across and 1.1–1.2 m tall depending on the brand.
How much does a full tank weigh?
Water weighs exactly 1 kg per litre — a full 1000 L overhead tank is about a tonne, plus the tank. Make sure the slab or staging is designed for it.