Gravel & Crushed Stone Calculator
Results update as you type
Your Results
* Add 10–15% overage for waste, spreading losses, and uneven terrain.
How We Calculate This +
Formula
Area × (Depth ÷ 12) ÷ 27 = Cu Yd · Cu Yd × Density = Tons
Key Assumptions
- Densities: pea gravel 1.40 t/cu yd · crushed stone 1.40 · river rock 1.35 · lava rock 0.65 · decomposed granite 1.50
- Compaction factor 1.10 applied when “Include compaction” is enabled
Price ranges based on national averages from HomeGuide, Angi, and LawnStarter. Updated May 2026.
Gravel Depth by Application
| Application | Depth | Notes |
|---|---|---|
| Driveway (base layer) | 4–6 inches | Compact in 2” lifts. Use crushed stone. |
| Driveway (top / surface layer) | 2–3 inches | Pea gravel or small crushed stone (⅜”). |
| Walkway / pathway | 2–3 inches | Pea gravel or small crushed stone. |
| Patio base (under pavers) | 4 inches | Compact before installing pavers. |
| French drain (drainage) | 6–12 inches | Use clean ¾” crushed stone, no fines. |
| Garden decorative / mulch alternative | 2–3 inches | River rock or lava rock for aesthetic use. |
How to Use the Gravel Calculator
- 1 Choose your shape — Rectangle for driveways and rectangular beds, circle for round features like garden islands.
- 2 Enter dimensions in feet — For driveways, measure the full length and width including any wider entry areas.
- 3 Select depth and gravel type — The calculator applies the correct density for each material. Enable the compaction factor for driveways and structural bases.
- 4 Get your cubic yards and tons — Use cubic yards when ordering from a landscape supplier, tons when ordering by weight. Add $50–$150 for delivery to your total budget.
Frequently Asked Questions
How deep should gravel be for a driveway? +
How much gravel do I need for a walkway? +
Pea gravel vs crushed stone: which is better? +
How many tons of gravel are in a cubic yard? +
How much does gravel delivery cost? +
Gravel Buying Guide: Cubic Yards, Tons, and What to Order
Gravel is sold two ways: by the cubic yard (volume) or by the ton (weight). Landscaping suppliers often quote by the cubic yard, while quarries and aggregate suppliers may use tons. Our calculator shows both — use whichever unit your supplier quotes.
Which Gravel Type Is Right for Your Project?
Crushed stone (road base) is the workhorse for driveways and base layers. Its angular edges compact together firmly, creating a stable surface that won’t shift under vehicle weight. Pea gravel is the go-to for decorative paths, drainage beds, and play areas where soft, rounded stones are preferred. River rock brings a natural aesthetic to garden borders and dry creek beds, though it’s the most expensive option. Decomposed granite compacts into an almost solid surface — excellent for pathways, patios, and desert landscaping. Lava rock is the lightest option, well-suited for mulch replacement in low-maintenance landscapes and garden beds.
How to Order Gravel Without Overspending
- Order 10–15% more than your calculated amount to account for settling, spreading losses, and edges.
- For driveways, ask whether the supplier sells base and top layer separately — the cost difference is usually significant.
- A 10-ton load is a common minimum for full-truck delivery. If your project needs less, check if the supplier offers partial loads or haul-it-yourself pricing.
- Get at least two or three quotes — gravel pricing varies by 20–50% between suppliers in the same area.
Ready to order? Use the gravel calculator above ↑ to get your exact cubic yards and tons before calling your supplier.