Tool
Mulch Calculator
Estimate mulch volume in cubic yards for garden beds and landscaping.
Construction Calculators
What this tool does
Estimate how much mulch you need for garden beds and landscape areas. Output is shown in cubic yards for bulk delivery or bag planning.
How to use
- Measure bed length and width in feet.
- Enter desired mulch depth in inches.
- Review cubic yard volume before ordering.
Examples
20x4 bed at 3 inches deep
Input: Length: 20 ft, Width: 4 ft, Depth: 3 in
Output: Mulch needed: 0.74 cubic yards
Volume = 20 × 4 × (3/12) ft = 20 cu ft ÷ 27 = 0.74 cu yd.
Assumptions
- Bed shape is rectangular.
- Depth is entered in inches and converted to feet.
- Does not account for compaction after installation.
Common use cases
- Plan bulk mulch delivery for garden beds
- Estimate bag counts from cubic yard totals
- Compare depth options for seasonal refresh
FAQ
How deep should mulch be?
Many beds use 2–4 inches. Avoid piling mulch against tree trunks.
Should I add extra?
Add 5–10% for settling and uneven bed edges.
Can I use this for soil or compost?
Yes, for volume planning, though compaction and density differ by material.
Related tools
Last reviewed: 2026-05-23