Tools / Mulch Calculator
Free tool

Mulch calculator

Figure out exactly how much mulch to order for your beds and borders. To find how much mulch you need, measure your area's length and width in feet and pick a depth in inches. The calculator multiplies length × width × depth, then divides by 324 to give cubic yards, and estimates tons using mulch's typical density of about 0.5 tons per cubic yard.

ft
ft
in

Tonnage is an estimate. Actual weight varies with moisture and material. When in doubt, round up.

1.85
cubic yards

≈ 0.93 tons at about 0.5 tons per cubic yard

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How to calculate how much mulch you need

  1. Measure the length of your area in feet
  2. Measure the width of your area in feet
  3. Choose your depth in inches (3" is typical for mulch)
  4. Multiply length × width × depth, then divide by 324 to get cubic yards
FAQ

Questions, answered.

How many cubic yards of mulch do I need?+

Multiply your bed length by width (in feet) by the depth (in inches), then divide by 324. For a 3-inch depth, a quick shortcut is length × width ÷ 108.

How deep should mulch be?+

2 to 3 inches is typical for most beds; 3 to 4 inches helps suppress weeds. Deeper than 4 inches can suffocate plant roots.

How much does a yard of mulch weigh?+

About 800 to 1,000 lbs (roughly half a ton) when dry. Wet mulch weighs noticeably more.