Calculate how many square feet that you need to cover then how much mulch you will need.
How much area do you have?

Square or Rectangle
  Length (feet)
  Width (feet)

Circle
  Diameter (feet)

Triangle
  Measure the length of the short and long side of the angle.
  Side one (feet)
  Side two (feet)

Total Area (Square feet): 
How much mulch do you need?
Thickness: 
Garden Size (sq. ft.): 

You will need:
1.5-cubic-foot bags or
2-cubic-foot bags or
3-cubic-foot bags or
cubic feet or
cubic yards
pickup trucks (midsize)
 
 Keep mulch away from the trunk of trees
 and shrubs to prevent decay dam
age.