Skip to content

Mulch Calculator

Calculate mulch, gravel, or stone needed for landscaping. Get cubic yards, bags, and weight for any material type.

How to Calculate Mulch

Measure your bed's length and width, choose your depth, and this calculator determines cubic yards, bags, and estimated cost.

Recommended Depths

  • 2 inches: Light refresh of existing beds
  • 3 inches: Standard coverage for most beds
  • 4 inches: New beds or heavy weed suppression
  • 6 inches: Pathways with heavy foot traffic

Material Options

  • Wood Mulch: Affordable, natural look, decomposes
  • Rubber Mulch: Long-lasting, good for playgrounds
  • Pea Gravel: Decorative, good drainage
  • River Rock: Permanent, no replacement needed

Coverage Chart (per cubic yard)

  • 2" deep: 162 sq ft
  • 3" deep: 108 sq ft
  • 4" deep: 81 sq ft

Related Calculators

Frequently Asked Questions

How deep should mulch be?

2-3 inches for refreshing existing beds, 3-4 inches for new beds. Avoid going over 4 inches as it can suffocate plants.

How much does a cubic yard of mulch cover?

One cubic yard covers about 162 sq ft at 2 inches deep, 108 sq ft at 3 inches, or 81 sq ft at 4 inches.

Should I buy bagged or bulk mulch?

Bulk is cheaper for large areas (500+ sq ft). Bags are convenient for small beds and easier to transport.

How often should I replace mulch?

Wood mulch decomposes and needs refreshing yearly. Rubber mulch and stone last much longer.