How much gravel do I need?
Measure the coverage area in square feet, enter depth in inches, and convert the volume to cubic yards. A 300 sq ft area at 3 inches deep is about 2.78 cubic yards before waste.
Cubic yards vs tons
The calculator can estimate volume in cubic yards, but many suppliers sell gravel or rock by the ton. Use supplier density to convert between volume and weight when ordering.
Depth, compaction, and waste
Decorative rock, paths, driveways, and base layers use different depths. Compacted base material may need more loose material than the finished compacted depth suggests.
What affects gravel cost?
Material type, haul distance, delivery minimums, density, compaction, and base prep all affect final cost. The calculator focuses on material math, not a contractor quote.
Gravel project example estimates
Examples are before waste and before any tonnage conversion. Supplier density and compaction can change the order.
| Project example | Area and depth | Cubic yards |
|---|---|---|
| Path | 150 sq ft at 2 in | 0.93 cu yd |
| Decorative rock bed | 250 sq ft at 3 in | 2.31 cu yd |
| Small parking pad | 300 sq ft at 4 in | 3.70 cu yd |
| Driveway strip | 480 sq ft at 4 in | 5.93 cu yd |
| Deep base layer | 600 sq ft at 6 in | 11.11 cu yd |
Gravel coverage by depth
Coverage assumes 1 cubic yard, which is 27 cubic feet. Waste, compaction, settling, and irregular grade are not included.
| Depth | Coverage from 1 cu yd | Coverage from 2 cu yd |
|---|---|---|
| 1 in | 324 sq ft | 648 sq ft |
| 2 in | 162 sq ft | 324 sq ft |
| 3 in | 108 sq ft | 216 sq ft |
| 4 in | 81 sq ft | 162 sq ft |
| 6 in | 54 sq ft | 108 sq ft |
| 12 in | 27 sq ft | 54 sq ft |
Common density planning values
Use supplier-provided density for final tonnage. These broad values are planning placeholders, not product specifications.
| Material | Broad planning density | Notes |
|---|---|---|
| Gravel / crushed stone | 2,600-3,000 lb/cu yd | Varies by gradation, moisture, and compaction. |
| Sand | 2,400-3,000 lb/cu yd | Moisture can noticeably change weight. |
| Topsoil / dirt | 1,800-2,600 lb/cu yd | Moisture and organic matter change density. |
| Mulch | 400-1,000 lb/cu yd | Usually ordered by volume, not weight. |
| Compost | 800-1,500 lb/cu yd | Depends on moisture and material mix. |
Before you calculate
- Measure the area to be covered, then choose the compacted depth you actually need.
- Calculate driveways, paths, drains, and base layers separately when depths differ.
- Use density inputs only when converting volume into tons or weight.
Common mistakes
- Ordering by tons without checking the supplier's density assumption.
- Forgetting compaction for base layers.
- Combining decorative top rock and structural base rock into one estimate.
Formula
cost = ((area * (depth / 12) / 27) * (1 + wastePercent / 100) * densityPerCubicYard / 2000) * pricePerTon
Assumptions
- Depth is entered in inches.
- Density and price per ton vary by supplier, moisture, screening size, and compaction.
- Delivery, grading, fabric, base prep, disposal, and labor are separate.
Example
Estimated landscape rock cost: 222 USD
How to estimate landscape rock cost
- Measure project area and planned depth, then estimate material volume.
- Enter supplier density so the calculator can convert volume into tons.
- Enter price per ton and include waste or delivery buffer if applicable.
- Multiply estimated tons by the price per ton to get a planning cost.
- Confirm local price, delivery minimums, moisture, compaction, and tax or fees with the supplier.
Before you buy materials
- Ask whether the supplier sells by cubic yard, ton, scoop, or bag.
- For compacted base, plan for placement and compaction rather than loose depth alone.
FAQ
How do I estimate landscape rock cost?
Estimate landscape rock cost by using the measured quantity as a cost input, then multiplying by material price, labor or unit price, delivery, and waste where relevant. The default example returns 222 USD. Quantity detail: Use cubic yards = area x (depth inches / 12) / 27, then add waste if needed. For a cost estimate, use that quantity as the buying amount, then multiply by unit price and add labor, delivery, prep, waste, and local charges where relevant.
How many square feet does 1 cubic yard of gravel cover?
One cubic yard covers about 162 sq ft at 2 inches deep, 108 sq ft at 3 inches, 81 sq ft at 4 inches, or 54 sq ft at 6 inches before waste. For a cost estimate, use that quantity as the buying amount, then multiply by unit price and add labor, delivery, prep, waste, and local charges where relevant.
Should I order gravel by yards or tons?
Use the unit your supplier sells. Cubic yards estimate volume, while tons estimate weight. Density connects the two. For a cost estimate, use that quantity as the buying amount, then multiply by unit price and add labor, delivery, prep, waste, and local charges where relevant.
Should I include compaction?
Yes for base layers and driveways. Compaction, subgrade variation, and delivery loss are common reasons to include waste.
Does this replace a site estimate?
No. It is a planning calculator. Final quantity depends on grade, base condition, material type, and supplier delivery units.
Related calculators
This calculator is for planning estimates only. Verify final quantities with product labels, project conditions, and a qualified professional when accuracy matters.