Gravel Calculator (Yards, Tons & Cost Estimator)

This gravel calculator helps contractors and homeowners accurately estimate how much material is required for driveways, patios, drainage systems, and landscaping. It calculates cubic yards, total tons, and project cost based on your exact dimensions and material type.

Unlike basic calculators, this tool accounts for material density differences (pea gravel vs crushed stone), giving you more realistic tonnage estimates—critical when ordering from suppliers who sell by weight.

Related Calculators for Your Project

Concrete Calculator | Block Calculator | Driveway Calculator

Helpful Guides

Gravel Calculation Guide | Gravel Landscaping Guide | Gravel Drainage Guide | Gravel Driveway Guide

How to Use

Enter the length and width in feet, along with the desired depth in inches for your project area. The calculator automatically converts these measurements into total volume (cubic yards) and weight (tons) based on the selected gravel type.

If you know your supplier’s price per ton, enter it to get an instant cost estimate. This allows you to quickly compare material options and stay within budget before placing an order.

This saves time when calling suppliers and helps avoid under-ordering or overpaying.

Real-World Examples (With Numbers)

Example 1: Standard Driveway
A 40 ft long × 12 ft wide driveway at 4 inches deep:

• Volume: ~5.9 cubic yards
• Weight: ~8.2 tons (crushed stone)
• Cost (@ $55/ton): ~$451

This is typical for a single-car gravel driveway base layer.

Example 2: Backyard Patio Base
A 20 × 20 ft patio at 3 inches:

• Volume: ~3.7 cubic yards
• Weight: ~5.2 tons
• Cost (@ $60/ton): ~$312

Ideal for paver preparation.

Example 3: Drainage Trench
A 50 ft trench, 2 ft wide, 6 inches deep:

• Volume: ~1.85 cubic yards
• Weight: ~2.6 tons
• Cost (@ $70/ton): ~$182

Common for French drains or foundation drainage.

Cost Breakdown & What You're Really Paying For

Gravel pricing isn't just about material—it includes several components:

• Material cost: $30–$75 per ton depending on type
• Delivery fees: $50–$150+ depending on distance
• Minimum load charges: Many suppliers require 3–5 ton minimums
• Labor (if installed): $40–$100/hr or $1–$3 per sq ft

Example Total Project Cost:
Driveway requiring 8 tons:

• Material: $440
• Delivery: $100
• Total DIY Cost: ~$540
• Installed: $900–$1,500+

Tip: Ordering slightly more (5–10%) often avoids costly second deliveries.

When to Use This Calculator

• Planning a new driveway or extending an existing one
• Estimating base material for pavers or concrete slabs
• Installing drainage systems (French drains, trenches)
• Landscaping projects like pathways or decorative rock areas
• Budgeting material costs before calling suppliers

When This Calculator May Not Be Enough

• Projects with uneven terrain or slopes
• Areas requiring multiple layers (base + top gravel)
• Soil conditions that require excavation or geotextile fabric
• Commercial jobs needing engineered compaction specs

In these cases, use this as a baseline estimate and adjust based on site conditions.

Common Mistakes to Avoid

• Underestimating depth: 2" is often not enough for driveways—4"+ is recommended
• Not accounting for compaction: Gravel can settle 10–20%
• Ignoring waste: Always add 5–10% extra
• Choosing the wrong material: Pea gravel shifts; crushed stone compacts
• Forgetting delivery limits: Trucks may not access tight areas

These mistakes are the main reason projects go over budget or fail prematurely.

Pro Tips for Better Results

• Use crushed stone for structural stability (driveways, base layers)
• Install in 2–3 inch compacted lifts for best results
• Add landscape fabric to reduce weed growth
• Compact with a plate compactor for long-term durability
• Check supplier density values for more accurate tonnage

Frequently Asked Questions

1. How much gravel do I need for a driveway?
Most driveways require 4–6 inches of gravel. A typical single-car driveway (40×12 ft) uses about 6–10 tons depending on depth.

2. How many square feet does 1 yard cover?
At 2 inches deep: ~162 sq ft
At 3 inches: ~108 sq ft
At 4 inches: ~81 sq ft

3. How many tons are in a cubic yard?
Typically 1.3–1.5 tons, depending on gravel type and moisture.

4. Should I use pea gravel or crushed stone?
Crushed stone is better for driveways and structural support. Pea gravel is better for decorative use.

5. How much extra gravel should I order?
Add 5–10% to account for compaction, uneven ground, and waste.

6. Can I lay gravel directly on soil?
Yes, but it's recommended to use landscape fabric and compact the base to prevent sinking and weeds.

7. Why is my tonnage different from the supplier?
Suppliers may use slightly different density values. Always confirm their weight per cubic yard.

8. How deep should gravel be for drainage?
Drainage systems typically use 4–6 inches, depending on water flow requirements.