Methods to calculate the volume of tanks and the volume of a liquid inside a tank Actual water and oil tanks may not be perfect geometric shapes or might have other features not accounted for here so, these calculations should only be considered estimates. These tank shapes are calculated assuming exact geometric solid shapes such as cylinders, circles and spheres. Tank volume calculations are based on tank geometries shown below. fluid gallons, Imperial (UK) gallons, cubic feet (ft³), metric liters and cubic meters (m³). dimensions in feet (ft) or inches (in), or metric dimensions in meters (m) or centimeters (cm).

Estimate the total capacity and filled volumes in gallons and liters of tanks such as oil tanks and water tanks.