How Much Gravel Do I Need? Driveway and Landscaping Guide
Calculate gravel quantity for driveways, walkways, drainage, and landscaping. With coverage charts, material types, and delivery tips.
Gravel is one of the most versatile construction materials — driveways, drainage beds, pathway base layers, patio bases, and decorative landscaping all rely on it. Getting your quantity right before ordering prevents both costly shortfalls and the headache of having too much material with nowhere to put it.
Quick Answer: Volume (cubic yards) = Length × Width × Depth (in feet) ÷ 27. Add 10% for waste. Suppliers often quote by the ton — crushed limestone runs about 1.4–1.5 tons per cubic yard. Use our Gravel Calculator to get both volume and weight.
The Core Calculation
All gravel volume calculations follow the same formula:
Volume (cubic feet) = Length × Width × Depth Volume (cubic yards) = Volume (cubic feet) ÷ 27
For a 100-foot driveway, 12 feet wide, 4 inches deep:
- 100 × 12 × (4/12) = 400 cubic feet
- 400 ÷ 27 = 14.8 cubic yards
Add 10% for compaction and spillage: 16.3 cubic yards → order 17 yards
Use our Gravel Calculator to handle these conversions automatically and get weight estimates for delivery planning.
How Much Gravel for a Driveway?
A gravel driveway needs two layers:
- Base layer (3/4” crushed stone): 4–6 inches, provides structural support
- Surface layer (1/2” or smaller): 2–3 inches, provides the finished surface
Gravel Driveway Coverage Chart
| Driveway Size | 4” Depth | 6” Depth |
|---|---|---|
| 100 ft × 10 ft | 12.3 yd³ | 18.5 yd³ |
| 100 ft × 12 ft | 14.8 yd³ | 22.2 yd³ |
| 200 ft × 12 ft | 29.6 yd³ | 44.4 yd³ |
| 100 ft × 16 ft | 19.8 yd³ | 29.6 yd³ |
Add 10% to each figure for waste.
Gravel Material Types
| Type | Use | Notes |
|---|---|---|
| 3/4” crushed limestone | Driveways, base layers | Most common, good drainage |
| Pea gravel | Walkways, drainage beds | Rolls underfoot, not ideal for traffic |
| Crushed granite | Decorative, pathways | Good compaction, attractive |
| River rock | Decorative landscaping | Does not compact, stays loose |
| Clean fill gravel | Drainage, backfill | Free of fines, excellent drainage |
| Recycled concrete | Base layers | Economical, good compaction |
Gravel Weight — Tons vs. Yards
Gravel suppliers often quote by the ton, not the cubic yard. Conversion factors:
| Material | Tons per Cubic Yard |
|---|---|
| Crushed limestone | 1.4–1.5 tons/yd³ |
| Pea gravel | 1.3–1.4 tons/yd³ |
| Crushed granite | 1.4–1.6 tons/yd³ |
| River rock | 1.3–1.5 tons/yd³ |
| Sand | 1.3–1.4 tons/yd³ |
To convert cubic yards to tons: multiply by the tons-per-yard factor.
For our 17-yard driveway example with limestone: 17 × 1.45 = 24.65 tons → order 25 tons
How Deep Should Gravel Be?
| Application | Recommended Depth |
|---|---|
| Decorative landscape | 2–3 inches |
| Foot traffic path | 3–4 inches |
| Light vehicle driveway | 4–6 inches |
| Heavy vehicle driveway | 6–8 inches |
| Base for paver patio | 4–6 inches (compacted) |
| Drainage trench | Fill to within 2–3” of surface |
Gravel Delivery and Placement
Delivery Sizes
- Pickup truck: 0.5–1 cubic yard
- Small dump trailer: 2–3 cubic yards
- Single-axle dump truck: 5–7 cubic yards
- Tandem dump truck: 12–15 cubic yards
For most driveway projects, a tandem dump truck is the most cost-effective delivery method. Most suppliers have a minimum delivery charge regardless of quantity.
Compaction
Gravel for driveways must be compacted, especially the base layer. A vibrating plate compactor (rental: $60–$90/day) increases density and stability. Without compaction, the gravel will settle unevenly under vehicle loads.
Compact in 3–4 inch lifts — don’t try to compact 8 inches at once.
Frequently Asked Questions
How long does a gravel driveway last? A properly installed gravel driveway — with good base preparation, adequate depth, and proper drainage — can last 20+ years with minimal maintenance. You’ll typically add a thin refresh layer every 5–10 years as the surface stones migrate or compact.
Do I need fabric under gravel? For landscaping beds and decorative areas, weed fabric under gravel helps prevent weeds and soil mixing. For driveways, fabric is sometimes used at the subgrade/gravel interface, but opinions vary — some contractors skip it under high-compaction base layers.
What’s the cheapest driveway gravel? Recycled crushed concrete is typically the cheapest option ($15–$25/ton vs. $25–$50/ton for quarried stone). It compacts well and performs comparably to new crushed stone for base applications.
How much does gravel delivery cost? Gravel itself is $25–$75 per ton depending on material and location. Delivery adds $50–$150 for local hauls, more for longer distances. For large quantities, ask about spreading with the truck — many drivers can spread gravel along a driveway from the truck.
See also: Excavation Calculation Methodology — volume formulas, bulk density tables, swell/shrink factors, and coverage calculations behind ConstructCalc excavation and fill calculators.
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