Landscape Gravel Calculator
Calculate decorative gravel, crushed granite, river rock, and lava stone in cubic yards, tons, and bags for flower beds, planters, and yard borders.
1Project Shape & Dimensions
2Gravel Type & Density
Smooth, rounded stones naturally weathered by water. Ideal for barefoot walkways, patios, playground surrounds, and decorative garden beds.
3Gravel Depth & Compaction
Accounts for roller compaction settlement, uneven ground contours, and wheelbarrow spill.
Material & Delivery Cost Estimator
- Bulk delivery dump trucks usually require a 10–12 ft wide clearance path.
- Always verify if your quarry quotes in Tons or Cubic Yards.
- Order ~10% extra to prevent having to pay a second delivery fee for a half-ton deficit.
Landscape Rock Selection & Sizing Guide
| Landscape Style | Best Aggregate | Typical Depth | Benefits |
|---|---|---|---|
| Flower Beds & Shrubs | River Rock (1"–2") | 3.0 inches | Retains soil moisture, prevents mulch rot |
| Southwest / Xeriscaping | Decomposed Granite | 3.0 inches | Natural desert aesthetic, firm packable surface |
| Modern Minimalist | Crushed Granite / Lava Rock | 2.5–3 inches | High contrast colors (dark grey, black, brick red) |
| Garden Walkways | Pea Gravel (3/8") | 2.5 inches | Comfortable underfoot, easy to shovel and rake |
Landscape Gravel FAQs
Q: Is gravel mulch better than wood mulch for landscaping?
Gravel rock mulch never decomposes, does not blow away in high winds, does not attract termites or pests, and only needs to be installed once. While initial installation cost is higher ($40–$70/ton vs $30/yd³ for wood), rock mulch saves hundreds of dollars over 5–10 years in replacement labor.
Q: How deep should landscape rock mulch be installed?
Install fine gravel (pea gravel, 3/8" chips) at 2.5 to 3 inches depth. Install medium landscape rock (3/4" to 1.5") at 3 inches depth, and large decorative cobble (2" to 4") at 4 to 5 inches depth.
Q: Do I need landscape fabric under landscape gravel?
Yes, always install heavy-duty commercial woven or non-woven geotextile fabric beneath landscape rock. It prevents gravel from sinking into garden mud and stops perennial weeds from taking root in the subsoil.