Mulch Calculator

Calculate exactly how much mulch you need for your garden beds. Get results in bags or bulk cubic yards with our free calculator.

Calculate Your Mulch
Units:

Pricing Options

Your Results

Enter your area and depth to calculate mulch needs.

Mulch Coverage Guide

Proper mulch coverage is essential for healthy gardens. Our calculator helps you determine the exact amount of mulch needed for your landscaping project, whether you're buying in bulk or by the bag.

Benefits of Proper Mulching

  • Retains soil moisture and reduces watering needs
  • Suppresses weed growth naturally
  • Regulates soil temperature
  • Adds nutrients as it decomposes
  • Enhances garden appearance

Mulch Depth Recommendations

  • 2-3 inches (5-7.5 cm): Ideal for most garden beds and around trees
  • 3-4 inches (7.5-10 cm): Better for weed suppression in problem areas
  • 1-2 inches (2.5-5 cm): Sufficient for annual flower beds

Pro Tips

  • Keep mulch 3-4 inches (7.5-10 cm) away from tree trunks and plant stems
  • Refresh mulch annually or as needed
  • Consider color fade when choosing mulch types
  • Order 10% extra to account for settling

Coverage Reference

  • 1 cubic yard covers approximately 100 sq ft at 3 inches deep
  • 1 cubic meter covers approximately 10 sq m at 10 cm deep
  • 2 cu ft bag covers about 8 sq ft at 3 inches deep
  • 3 cu ft bag covers about 12 sq ft at 3 inches deep
  • 40L bag covers about 0.5 sq m at 7.5 cm deep
  • 56.6L bag covers about 0.75 sq m at 7.5 cm deep

Common Bag Sizes

  • Imperial: 1.5, 2, 2.5, and 3 cubic feet bags
  • Metric: 25L, 40L, 50L, 56.6L, and 75L bags

Garden questions, answered

Common questions before you buy materials

Use these quick answers alongside the calculator so you can plan the right amount, avoid waste, and keep your garden project moving.

How deep should mulch be around garden beds?
Most flower beds and vegetable gardens do well with 2 to 3 inches of mulch. Use 3 to 4 inches for weed control in open beds, and keep mulch a few inches away from plant stems and tree trunks.
Is bulk mulch or bagged mulch better?
Bulk mulch is usually better for large garden beds because it costs less per cubic yard. Bagged mulch is easier for small beds, container gardens, or quick weekend touch-ups.
When should I refresh mulch?
Refresh mulch when the layer has broken down below about 2 inches or bare soil is showing. Many gardens need a light top-up once or twice a year, often in spring and again after summer heat.