Mulch Calculator
Figure out how many cubic yards or bags of mulch to buy.
Work out how many cubic yards or bags of mulch you need to cover flower beds, tree rings or landscaped borders at the right depth.
Measurement System
Your Estimate
Total Area
150.0 ft²
Cubic Feet
37.5 ft³
Cubic Yards
1.39 yd³
Bags Needed
19
Recommended depth for mulch beds is 2-4 inches. Bag size assumed in cubic feet.
Results Actions
Common Depths and Thicknesses
Flower beds2–3 inches
Trees and shrubs3–4 inches
Weed control3 inches
Playground mulch6–12 inches
Accuracy & Assumptions
- Results are estimates only.
- Mulch coverage and bag sizes can vary by manufacturer and product type.
- Consider ordering an additional 5–10% for settling and uneven bed edges.
- Verify all bed measurements before purchasing materials.
- Check manufacturer recommendations for safe mulch depth around trees and plants.
How This Calculator Works
- 1Enter the length and width of the bed in feet.
- 2Set your target depth — 2-4" is standard for weed suppression and moisture retention.
- 3We calculate total cubic yards and divide by your bag size to get bag count.
Helpful Tips
- Keep mulch a few inches back from tree trunks and stems to prevent rot.
- Bagged mulch is usually sold in 2 cubic foot bags — bulk delivery is cheaper for larger beds.
- Refresh mulch annually as it breaks down and compacts over the season.
This calculator provides an estimate for planning purposes only. Material needs vary by site conditions, waste and supplier specifications — always confirm final quantities with your contractor or supplier before purchasing.