Convert depth into feet
Mulch is usually sold by the cubic yard, but customers often describe the job in square feet and inches of depth.
The basic formula is area times depth in feet, divided by 27. A 1,200 square foot bed at 3 inches deep is 1,200 × 0.25 ÷ 27, or a little over 11 cubic yards before waste.
Round like a landscaper, not a textbook
Real beds are irregular, edges taper, and material compacts. Add a waste allowance and round to an order quantity that matches how your supplier sells material.
Being slightly short on mulch burns time, creates a second trip, and makes the job feel less professional.
Installed price is more than material
Material cost is only one part of the job. Delivery, loading, wheelbarrow distance, bed prep, edging, cleanup, labor burden, and overhead all belong in the installed price.
The customer sees a clean installed number. Your internal estimate keeps the cost structure visible to you.
