Popular calculators
A 10×10 garden bed at 3 inches deep needs about 0.93 cubic yards of mulch — roughly 14 standard 2 cu ft bags. Enter your bed dimensions below for cubic yards, bag counts, and a copyable garden-center shopping list.
Mulch Calculator
Enter garden bed dimensions. Get cubic yards, bag counts, and optional cost estimates.
Garden beds
Project settings
Use the project-specific starting depth, then verify locally
Default 10% for settling
Default 2 cu ft
Uses the bag size above
Landscaping guides
View all guides →How it works
- 1. Measure bedsEnter length and width in feet and inches for each garden bed or landscaping area.
- 2. Set depth & materialChoose mulch, gravel, or topsoil. Adjust depth and waste allowance for your project.
- 3. Order with confidenceWe calculate cubic yards and bag counts and let you copy a shopping list for the garden center.
FAQ
How much mulch do I need?
Multiply bed area (length × width) by depth in feet, then divide by 27 for cubic yards. A 10×10 bed at 3 inches needs about 0.93 cubic yards — round up to 1 yard when ordering bulk.
How many bags equal a cubic yard?
One cubic yard is 27 cu ft. Standard mulch bags hold 2 cu ft, so you need about 14 bags per cubic yard.
Does this work for gravel and topsoil?
Yes. Switch material type in project settings. The math is the same — area × depth — regardless of material.
Can I calculate multiple beds?
Yes. Add up to five beds and the calculator totals area, volume, and bags for the whole project.