Trees & plants · FREE PROJECT TOOL

Tree mulch ring calculator

Measure your project. Make a clearer plan.
Calculate mulch around trees while leaving an open center around the trunk.

Your measurements

ft
ft
in
%
USD / cu yd
USD

All prices are USD and supplied by you. Starting quantities are examples.

BEHIND THE NUMBERS

Clear math. Better decisions.

Ring volume = π/4 × (outer diameter² − inner diameter²) × depth × number of rings × allowance factor.

A worked example

A 6 ft ring with a 1 ft open center and 2 inches depth holds 4.58 cu ft before extra.

Before you order

  • Calculate mulch around trees while leaving an open center around the trunk.
  • Keep mulch off the trunk and account for mulch already present.

Reference: University of Maryland Extension: Mulching trees and shrubs.

Good questions.

Where do the prices come from?

You enter actual supplier prices. A blank price is unknown; enter zero only when that item is free or deliberately excluded. Taxes and installation are excluded unless a field explicitly includes them.

Can I use metric measurements?

Yes. The unit selector converts dimensions and unit prices. Results use whole packages where applicable. Starting dimensions are examples; confirm product specifications before ordering.

KEEP THE PROJECT MOVING

Next in your tool shed.