How the numbers are worked out
Volume = area x depth. One cubic yard is 27 cubic feet. Bag counts divide the volume by the bag size and always round up. The calculator adds a 10% allowance by default for settling and uneven ground; you can turn it off.
Weights use average densities (20 lb per cubic foot for mulch). Real products vary with moisture and type, so check the bag label or ask your supplier.
We do not publish prices because they vary by region and season. Where cost matters we give you a box to enter your own quotes.