Gravel Calculator
Calculate how much gravel you need for driveways, pathways, landscaping, and ground coverage. Get results in cubic yards, tons, bags, and estimated costs for bulk or bagged gravel delivery.
How Much Gravel Do I Need?
Determining the correct amount of gravel for your project prevents waste and ensures complete coverage. Whether you're building a driveway, creating a pathway, or landscaping a garden area, accurate calculations save time and money. The key is measuring your area carefully and accounting for the depth needed based on your intended use.
Gravel Depth Guide
The proper gravel depth depends on the application and traffic level. For decorative landscaping and garden beds, 1-2 inches provides adequate coverage and appearance. Pathways benefit from 2-3 inches for comfort and durability underfoot. Driveway base layers typically require 4-6 inches of gravel to support vehicle weight and provide proper drainage. For heavy-traffic areas or areas with equipment, 8-12 inches ensures long-lasting performance. Always account for settling and compaction, which reduces the initial depth by 10-15% over time.
Types of Gravel and Their Uses
Crushed Stone is angular and locks together well, making it ideal for driveway bases and heavily trafficked areas. It's durable and provides excellent drainage. Pea Gravel features smooth, rounded stones in various colors and is popular for decorative landscaping, pathways, and playgrounds. It's comfortable underfoot but requires more frequent raking. River Rock offers large, smooth stones perfect for decorative landscaping and water features. It's visually striking but not recommended for driveways. Decomposed Granite is a natural, weathered granite that compacts well for pathways and attractive driveway surfaces. It provides good drainage while remaining relatively stable.Lava Rock is lightweight and striking in appearance, ideal for decorative landscaping and xeriscaping. Its porous nature provides excellent drainage but it's not suitable for high-traffic areas.
Bulk vs. Bagged Gravel
Bulk gravel delivery is the most economical option for projects requiring more than 2-3 cubic yards. Prices typically range from $40-80 per cubic yard depending on the type and your location. Suppliers deliver and often spread the material for you. Bagged gravel, sold in 0.5-cubic-foot bags for $1-3 each, works best for small projects, accent areas, or when you need precise control over placement. For a 3-cubic-yard project, bulk costs roughly $120-240, while bagged could cost $200-400.
Gravel Calculator Formula
To calculate gravel needed: First, measure your area in square feet (for rectangles: length × width; for circles: π × radius²). Multiply the area by your desired depth in feet (2 inches = 0.17 feet) to get cubic feet. Divide by 27 to convert to cubic yards. Add 5-15% for waste and settling. To find tons, multiply cubic yards by the gravel type's weight per cubic yard (typically 2,500-3,000 lbs), then divide by 2,000. For bags, divide total cubic feet by 0.5 and round up.
Tips for Using Gravel
- Compact gravel with a tamper or compactor for driveways
- Use landscape fabric underneath to prevent weed growth
- Choose angular stone for base layers, rounded for surfaces
- Slope areas slightly for proper water drainage
- Rake decorative gravel regularly to maintain appearance
- Refresh gravel annually as it settles and disperses
- Install edge barriers to prevent gravel from spreading into adjacent areas