Enter diameter and length, select a unit, then click Calculate Volume.

A cylindrical tank (cistern) is a common storage vessel used for liquids, gases, and solids. The volume of a cylinder is calculated using the formula V = π × r² × h, where r is the radius (half the diameter) and h is the height or length of the cylinder. This calculator helps determine the total capacity of a tank in cubic units, liters, and US gallons. Understanding tank volume is essential for industrial storage, water supply systems, fuel management, and agricultural applications. This tool is useful for engineers, facility managers, and homeowners planning tank installations or estimating storage capacity.

1. Enter the Diameter of the cylindrical tank.
2. Enter the Length (or height) of the tank.
3. Select the Unit of measurement (meters, centimeters, millimeters, inches, or feet).
4. Click Calculate Volume to compute the tank capacity.
5. The result shows volume in cubic units, liters, US gallons, and surface area.
6. Click Reset to restore default example values.