Estimate how many cubic yards of topsoil you need. Each dimension has its own unit selector (in/ft/yd/m).
Topsoil is sold by the cubic yard. Find each area's volume (length x width x depth), divide by 27 for cubic yards, and add about 10% for settling. New beds usually need 4-6 inches; one cubic yard covers about 100 sq ft at 3 inches. Use the unit selector to enter inches, feet, yards or meters.