Tank Volume Calculator – Water Capacity in Litres & m³
Use the tank volume calculator to perform a quick preliminary calculation from project dimensions and engineering assumptions. Review inputs and verify final results against project requirements.
Introduction
Calculate the volume and capacity of supported tank shapes using dimensions and consistent units.
Basic Volume Formulas
Rectangular tank volume is Length × Width × Height. Cylindrical tank volume is π × radius² × height. Other supported shapes require their corresponding geometric formula.
Capacity Conversion
One cubic metre equals 1,000 litres. Keep dimensions in a consistent unit system before calculating volume.
Usable vs Gross Capacity
A tank's gross geometric volume may be greater than its usable operating volume because of freeboard, dead storage, inlet/outlet levels and operational requirements.
Practical Applications
Use the tool for domestic water tanks, storage planning, rainwater systems and preliminary process calculations.
FAQs
Q: Is a 1 m³ tank exactly 1,000 litres? A: Geometrically yes, before considering unusable/dead volume.
Q: Does the tool design tank structure? A: No. Structural design is separate.
Disclaimer
Final tank capacity and structural design should account for demand, operating levels, supports, loads, material and applicable requirements.