The volume of a cylinder is given by:

Volume = Area of base x Height V=r2H where r is the radius of the circle and H is the height of the cylinder.

Like prisms, cylinders have a volume equal to the area of the base times the height. In a cylinder, the base is a circle so the formula for the volume of a cylinder becomes r²H, where r is the radius of the circle and H is the height of the cylinder.