Free Gravel Calculator - Calculate Gravel, Stone & Aggregate

How much gravel do I need for my project?

To calculate gravel needed, multiply length × width × depth of your area. For example, a 10×10 ft area with 3 inches depth needs about 0.93 cubic yards or 1.25 tons of gravel. Use our calculator above for accurate results including different shapes and gravel types.

How many tons of gravel are in a cubic yard?

Generally, 1 cubic yard of gravel weighs about 1.35 tons (2,700 lbs). However, this varies by gravel type:

• Pea gravel: 1.3 tons per cubic yard
• Crushed stone: 1.35-1.4 tons per cubic yard
• River rock: 1.35 tons per cubic yard
• Granite: 1.5 tons per cubic yard
• Limestone: 1.4 tons per cubic yard

What depth of gravel should I use?

Recommended gravel depths vary by application:

• Driveways: 4-6 inches (8-12" for heavy traffic)
• Walkways: 2-3 inches
• Patios: 3-4 inches
• Garden beds: 2-3 inches
• Drainage: 6-8 inches
• Parking areas: 6-8 inches

How do I calculate gravel for a circular area?

For circular areas, use the formula: π × radius² × depth. Our calculator handles this automatically - just select "Circular" shape, enter the diameter and depth, and it calculates the gravel needed in cubic yards and tons.

How much does gravel cost per ton?

Gravel costs typically range from $15 to $75 per ton, depending on:

• Type of gravel (pea gravel, crushed stone, decorative rock)
• Your geographic location
• Quantity ordered (bulk discounts available)
• Delivery distance
• Quality and source of material

Average prices: Crushed stone $15-30/ton, Pea gravel $20-35/ton, River rock $25-50/ton, Decorative stone $40-75/ton

Do I need landscape fabric under gravel?

Yes, landscape fabric is highly recommended under gravel for several reasons:

• Prevents weed growth through gravel
• Stops gravel from sinking into soil
• Improves drainage
• Extends the life of your gravel
• Easier maintenance

Use commercial-grade landscape fabric for best results, especially for driveways and high-traffic areas.

How many square feet does a ton of gravel cover?

Coverage depends on depth:

• At 2" depth: 1 ton covers ~100-120 sq ft
• At 3" depth: 1 ton covers ~70-80 sq ft
• At 4" depth: 1 ton covers ~50-60 sq ft
• At 6" depth: 1 ton covers ~35-40 sq ft

These are estimates for standard crushed stone (1.35 tons/yd³). Use our calculator for precise results.

What's the difference between crushed stone and gravel?

Crushed Stone: Mechanically crushed rock with angular edges. Better for driveways and bases as it compacts well and locks together. Sizes typically range from dust to 4 inches.

Gravel: Naturally rounded stones smoothed by water erosion. Better for decorative purposes and areas where you'll walk barefoot. Doesn't compact as well but looks more natural.

How do I calculate gravel for a driveway?

For driveways, follow these steps:

1. Measure length and width of driveway in feet
2. Determine depth (typically 4-6 inches)
3. Calculate volume: Length × Width × Depth (in feet)
4. Convert to cubic yards by dividing by 27
5. Multiply cubic yards by 1.35 for tons needed
6. Add 5-10% extra for settling and waste

Example: 30 ft × 12 ft × 0.5 ft = 180 ft³ ÷ 27 = 6.67 yd³ × 1.35 = 9 tons

Can I install gravel myself or should I hire professionals?

DIY Suitable for: Small walkways, garden beds, and light-use patios. You'll need basic tools (rake, shovel, wheelbarrow, tamper).

Hire Professionals for: Driveways, large patios, areas requiring proper grading, drainage issues, or projects over 10 cubic yards. Professionals have equipment for proper base preparation and compaction.

Cost comparison: DIY saves $300-$1000+ in labor but requires physical effort and time.

How long does gravel last?

Properly installed gravel can last 5-10+ years with minimal maintenance:

• Driveways: 5-7 years before needing refreshing
• Walkways: 7-10 years
• Decorative beds: 10+ years

Longevity factors: Quality of installation, drainage, traffic levels, weed control, and periodic maintenance (raking, adding material).

What size gravel is best for driveways?

Multi-layer approach works best:

• Base layer: 3-4" crushed stone (3/4" - 1.5")
• Middle layer: 2-3" smaller crushed stone (1/2" - 3/4")
• Top layer: 1-2" fine gravel or pea gravel (1/4" - 1/2")

Avoid using only pea gravel - it won't compact properly. Use angular crushed stone for stability.

How do I prevent gravel from spreading?

Keep gravel contained with these methods:

• Install edge restraints (metal, plastic, or wood borders)
• Use Belgian blocks or pavers for permanent edging
• Dig a slight trench and set borders below gravel level
• Apply stabilizer grid systems for heavy-traffic areas
• Compact gravel properly to reduce movement
• Use larger stone at edges to contain smaller gravel

How much gravel is in a dump truck load?

Dump truck capacity varies by truck size:

• Small dump truck: 5-7 cubic yards (7-9 tons)
• Standard dump truck: 10-14 cubic yards (13-18 tons)
• Large dump truck: 16-20 cubic yards (21-27 tons)
• Transfer truck: 20-25 cubic yards (27-33 tons)

Most suppliers deliver in standard 10-yard trucks. Always confirm capacity when ordering.

What's the best gravel for drainage?

For optimal drainage, use:

• Size: 3/4" to 1.5" crushed stone
• Type: Angular crushed stone (not rounded)
• Material: Limestone, granite, or crushed concrete
• Avoid: Fine particles, sand, or pea gravel

Larger angular stones create air pockets for water flow. Wrap drainage stone in geotextile fabric to prevent soil infiltration.

How often should I top up gravel?

Typical maintenance schedule:

• High-traffic driveways: Add 1-2" every 2-3 years
• Walkways: Top up every 3-5 years
• Decorative areas: Refresh every 5-7 years

Signs you need more gravel: Visible bare patches, exposed fabric, deep tire ruts, or reduced drainage.