How cylinder volume is calculated
The volume of a cylinder is the area of its circular cross-section multiplied by its height. The cross-section area uses the formula for a circle: pi times the radius squared. The radius is half the diameter.
Once the volume is in cubic feet, the calculator converts to cubic yards (divide by 27), gallons, and litres for practical ordering and comparison.
Volume = pi x (Diameter / 2)^2 x Height
Calculate the circular area from the diameter, then multiply by the height to get the volume.