Calculate how much gravel you need for your driveway, pathway, or landscaping project with our free gravel calculator. Get instant results in cubic yards.

How Much Gravel Do I Need?

The amount of gravel you need depends on: 1. Area dimensions - Length and width of the space 2. Depth - How thick you want your gravel layer 3. Gravel type - Different sizes settle differently 4. Base preparation - Properly prepared base reduces gravel needs

How to Use the Gravel Calculator

This calculator provides two easy methods to calculate your gravel needs:

Option 1: By Dimensions

Enter the length, width, and desired depth of your gravel area. Ideal for driveways, walkways, or parking areas.

Option 2: By Area

If you already know the square footage of your area, simply enter that value along with your desired gravel depth.

How Much Gravel Do I Need?

The amount of gravel you need depends on: 1. Area dimensions - Length and width of the space 2. Depth - How thick you want your gravel layer 3. Gravel type - Different sizes settle differently 4. Base preparation - Properly prepared base reduces gravel needs

Recommended Gravel Depth by Application

Different projects require different gravel depths:

• Driveways: 4-6 inches (recommend 6 inches for heavy vehicles)
• Walkways and paths: 2-3 inches
• Parking areas: 4-6 inches
• Decorative landscaping: 2-3 inches
• Drainage applications: 4-12 inches
• Under concrete slabs: 4-6 inches

Understanding Gravel Measurements

Cubic Yards

Gravel is typically ordered by the cubic yard. One cubic yard covers: - 324 square feet at 1 inch depth - 162 square feet at 2 inches depth - 108 square feet at 3 inches depth - 54 square feet at 6 inches depth

Tons

Gravel is often sold by weight (tons). As a general rule: - 1 cubic yard of gravel ≈ 1.4 tons (varies by stone type) - Pea gravel: ~1.3 tons per cubic yard - Crushed stone: ~1.4-1.5 tons per cubic yard - River rock: ~1.2-1.3 tons per cubic yard

Types of Gravel

Common gravel types for different applications:

1. Crushed Stone

• Sizes: #57 (3/4"), #67 (3/4" and smaller), #411 (mix with stone dust)
• Best for: Driveways, drainage, under concrete
• Pros: Compacts well, excellent drainage

2. Pea Gravel

• Size: 1/4" to 1/2" rounded stones
• Best for: Walkways, patios, decorative landscaping
• Pros: Smooth, comfortable to walk on, aesthetic appeal

3. River Rock

• Sizes: Various (1" to 6"+)
• Best for: Decorative features, dry creek beds, edging
• Pros: Natural appearance, smooth edges

4. Crushed Granite

• Size: Fine to 1/4"
• Best for: Pathways, patios, decomposed granite surface
• Pros: Compacts firmly, natural look

5. Marble Chips

• Sizes: Various
• Best for: Decorative landscaping, garden beds
• Pros: Bright white color, reflects light

Gravel Driveway Installation Guide

Layer Depths for a Proper Driveway:

1. Base layer: 4-6 inches of larger crushed stone (#2 or #3)
2. Middle layer: 2-3 inches of smaller crushed stone (#57)
3. Top layer: 2 inches of finer gravel or stone dust

Total depth: 8-11 inches for a durable driveway

Installation Steps:

1. Excavate area to proper depth
2. Install landscape fabric (optional but recommended)
3. Spread and compact base layer
4. Add and compact middle layer
5. Spread top layer and rake smooth
6. Compact entire surface with roller

Buying Gravel: What You Need to Know

Bulk vs. Bagged

• Bulk gravel (by the ton or cubic yard): Most economical for projects over 1/2 cubic yard
• Bagged gravel: Better for small decorative projects

Cost Factors

• Gravel type: Specialty gravels (marble chips, colored stone) cost more
• Delivery: Typically charged separately, costs vary by distance
• Location: Prices vary significantly by region
• Quantity: Bulk orders usually have better per-unit pricing

Ordering Tips

1. Always order 10-15% extra to account for settling and waste
2. Confirm delivery truck can access your site
3. Have area prepared before delivery
4. Ask about minimum order requirements

Gravel Maintenance

Regular Maintenance:

• Rake regularly to keep surface even
• Add fresh gravel every 2-3 years as material settles or migrates
• Edge maintenance to prevent gravel from spreading
• Weed control through landscape fabric or periodic herbicide application

Compaction:

• Compact gravel after installation
• Re-compact after heavy rains or settling
• Use a plate compactor for best results

Common Gravel Mistakes to Avoid

1. Insufficient depth: Too shallow won't support weight properly
2. No base preparation: Skipping excavation or base layer leads to problems
3. Wrong gravel type: Using decorative rock for high-traffic areas
4. No edging: Gravel spreads into lawns and gardens without proper edging
5. Poor drainage: Not addressing water runoff leads to washout
6. Skipping compaction: Loose gravel shifts and creates ruts

Benefits of Gravel

• Cost-effective: Generally cheaper than concrete or pavers
• Excellent drainage: Prevents water pooling
• Easy installation: DIY-friendly for most homeowners
• Low maintenance: Minimal upkeep required
• Versatile: Works for many applications
• Permeable: Eco-friendly, allows water infiltration

Gravel vs. Other Options

Gravel vs. Concrete

• Cost: Gravel is 40-60% cheaper
• Installation: Gravel is DIY-friendly
• Maintenance: Gravel needs periodic topping up
• Appearance: Concrete more formal, gravel more natural

Gravel vs. Asphalt

• Cost: Gravel significantly cheaper
• Lifespan: Asphalt lasts longer (15-20 years)
• Drainage: Gravel drains better
• Maintenance: Both need periodic maintenance

Gravel vs. Pavers

• Cost: Gravel much cheaper
• Appearance: Pavers more formal and structured
• Installation: Gravel faster to install
• Weeds: Pavers resist weeds better

Frequently Asked Questions

How deep should gravel be for a driveway?

For a standard driveway, 4-6 inches is recommended. For heavy vehicles or poor soil conditions, go with 6-8 inches or more.

What size gravel is best for a driveway?

57 crushed stone (3/4" angular gravel) is the most popular choice. It compacts well and provides good drainage.

How much does a yard of gravel cost?

Prices vary widely by region and type, but expect $15-$75 per cubic yard, plus delivery fees ($50-$150 typically).

Do I need landscape fabric under gravel?

While not required, landscape fabric helps prevent weeds, keeps gravel from mixing with soil, and improves stability.

How do I keep gravel in place?

Use proper edging (metal, plastic, or stone borders), compact the gravel well, and maintain a slight crown for drainage.

Can I pour concrete over gravel?

Yes, a 4-6 inch compacted gravel base is ideal under concrete slabs. It provides drainage and prevents cracking.

How long does a gravel driveway last?

With proper installation and maintenance, a gravel driveway can last 10+ years. You'll need to add fresh gravel every 2-3 years.

Related Calculators

Need to calculate materials for other projects? Try our: - Mulch Calculator - Sand Calculator - Topsoil Calculator - Rock Calculator

Pro Tip: Take photos and measurements of your project area. Most landscape supply companies can help you determine exactly what you need based on your specific application.