How it is calculated
Volume is the base area, πr², times the height. The lateral surface is a rectangle of length 2πr and width h. The total surface adds one circle on top and one underneath.
V = πr²h
Where the numbers come from
- Radius
- Height
Example
Radius 2, height 5. Volume π × 4 × 5 ≈ 62,83.
Questions
How do I calculate a pipe, not a solid cylinder?
Work out the volume from the outer radius and subtract the volume from the inner one. The calculator handles one cylinder at a time.
Height and radius in different units?
Bring them to one unit, or the volume will be meaningless.
Is this the volume of liquid in a barrel?
Yes, if the barrel is filled to the height you entered and the walls do not narrow.