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Materials & Projects

Mulch Calculator - Bags or Cubic Yards by Depth

Enter bed dimensions and desired depth to estimate bulk mulch volume. The result includes a small overage allowance.

Last updated: August 2026

Unit system Switch between U.S. customary and metric units. Your choice is remembered on other calculators.

Bed measurements to fill out

Use length and width for the bed area, then depth for how thick you want the mulch layer.

Visual guide

Which measurement goes where?

Length and width define the area. Depth is the average thickness of the mulch or topsoil layer.

ft
ft
in
A 2 in layer is common for refreshing existing beds; 3 in is a common new-bed target.
Advanced settings
cu ft/bag
Only used for the bag count estimate. Bulk mulch is usually ordered by cubic yard.
%

Buying and sizing notes

How to use this estimate

What this includes

  • The required inputs shown on this page
  • common planning assumptions
  • optional advanced adjustments where provided

What it does not include

  • site-specific professional design
  • local code approval
  • manufacturer-specific requirements
  • installation quality

Common mistakes

  • Leaving a required input at the default when your situation is different
  • ignoring product labels or ratings
  • treating the estimate as an exact final answer

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