Glossary: Tank Capacity
**Tank Capacity** is the total volumetric capacity that a storage vessel (such as a cylinder, rectangle, or horizontal tank) can hold when completely filled to its maximum design level, usually measured in US gallons, Imperial gallons, or metric liters.
Volumetric Storage Sizing
Calculating storage tank capacity accurately ensures compliance with building codes and secondary containment safety standards. In the US, gallons represent the standard unit, whereas liters and cubic meters (m³) govern metric regions.