Mulch Calculator

Calculate mulch volume for a rectangular bed, convert to cubic yards and feet, and estimate complete bags from their labeled volume.

Mulch quantity including allowance1.1000 m³
m or ft

0.001 – 1000000000

m or ft

0.001 – 1000000000

cm or in

0.001 – 1000000000

%

0 – 100

m³ per bag

0.000001 – 10

Mulch quantity including allowance

1.1000 m³

  • Cubic yards1.4387
  • Cubic feet38.8461
  • Whole bags to purchase20

Rectangular bed estimate with uniform depth. Bag volume and settling vary by product; use the supplier’s labeled volume.

How this was calculated

Convert length, width and thickness to meters.

Volume = length × width × depth × (1 + allowance/100).

Bag count = required volume ÷ product yield, rounded up.

Formula and method

Volume = bed length × width × depth. Apply the extra-material percentage before dividing by bag volume and rounding up.

Worked example

A 5 m × 4 m bed at 5 cm depth contains 1 m³. A 10% allowance raises the order estimate to 1.1 m³.

Frequently asked questions

Why should I check the bag volume?

Products use different bag sizes and may settle differently. The default is an editable example, not a universal manufacturer specification.

Last updated . Results are estimates for informational purposes only.