Mulch Calculator

Mulch depth and coverage

• 2–4 inch depth

  This range suppresses weeds, holds soil moisture, and moderates soil temperature. Go lighter near plant stems.

• Cubic feet

  Volume = area × depth (depth converted to feet). A 10×10 bed at 3 inches deep needs 25 cu ft of mulch.

• 2 cu ft bags

  Standard retail bag size. Always round up — partial bags are not sold, and a thin final pass looks better.

• Keep stems clear

  Do not pile mulch against trunks or stems. A volcano of mulch traps moisture and can cause rot.