# Hollow cylinder volume Calculator

Online Hollow cylinder volume Calculator: Calculate the volume of a Hollow Cylinder based on its height, outer radius r1 and internal radius r2. Enter three unknowns in the form and press the CALCULATE button."

## What is a Hollow Cylinder?

Hollow Cylinder(geometry) volume delimited by two circles of parallel planes and the lines connecting the points of these circles; roller, in the shape of a straight cylinder.

Hollow Cylinder(mechanical) in an engine, a cylindrical part where the piston moves; elongated and rounded object, more or less thick.

## The characteristics of the Hollow cylinder

Like prisms, the Hollow cylinder is made up of two bases, but the latter are not polygons, they are circles. In addition, the Hollow cylinder has other characteristics which are essential to its definition.

The two bases are isometric circles

The bases are parallel

Its side face is usually made up of a rectangle or a parallelogram.

## Calculate the volume of the Hollow cylinder

The calculation of the volume of a hollow cylinder of outside diameter d1, inside diameter d2, and height h is calculated from the following formula:

V = (π/4) . h . (d1² - d2²)

Considering the radii of the hollow cylinder r1 and r2 rather than its diameters d1 and d2, the calculation formula becomes:

V = π . h . (r1² - r2²)

## Principle of calculating the volume of a hollow cylinder

Principle of calculating the volume of a hollow cylinder The volume of a solid cylinder of diameter D and height h is calculated from the following formula:

A = (π / 4). D². h

To calculate the volume of a hollow cylinder, simply subtract from the volume of the outer cylinder the volume of the inner cylinder. Its volume V is therefore equal to:

A = (π / 4 . D² . h) - (π / 4 . d² . h) = π / 4 . h . (D² - d²)