MicroCalculatorsMulch Calculator
Estimate mulch volume needed for gardens and landscaping. Volume = area × depth. Enter area in sq ft and depth in inches.
Mulch Calculator — FAQ
- How often should I replace mulch?
- Annually for appearance; every 2–3 years is common. Top up as it compacts.
- What mulch depth is best for moisture retention?
- 2–4 inches is typical. Too deep can cause moisture problems; too shallow won't suppress weeds well.
- What is the difference between cubic feet and cubic yards?
- 1 cubic yard = 27 cubic feet. Bags are often in cubic feet; bulk delivery in cubic yards.
How Much Mulch Do I Need?
Mulch volume is surface area multiplied by mulch depth. Measure your garden bed or landscape area in square feet (length × width), then multiply by depth in feet. For depth in inches, divide by 12 first — e.g. 3 inches = 0.25 feet. The result is volume in cubic feet.
One cubic yard equals 27 cubic feet. Bulk mulch is often sold by the cubic yard; bags by cubic feet (typically 1.5–2). Order slightly more than calculated to account for settling and uneven terrain. A 2–4 inch depth is common for weed suppression and moisture retention.
For soil or raised beds, use our Soil Volume Calculator. For concrete projects, try the Concrete Calculator.
People Also Ask
- How much mulch do I need per square foot?
- How deep should mulch be for weed control?
- How many bags of mulch equal one cubic yard?
Want to learn more?
Read our full guide: How Much Soil and Mulch Do You Need? — depth recommendations by purpose, bags vs bulk, and how much settling to expect.
Last updated: February 2026