Gravel Calculator

How to Calculate How Much Gravel You Need

Calculating the right amount of gravel for your project is crucial to avoid shortages or excess material. Our gravel calculator helps you determine the exact quantity needed based on your measurements and the type of gravel you're using.

Understanding Gravel Measurements

Gravel is typically sold by the cubic yard or by the ton. One cubic yard of gravel will cover approximately 100 square feet at a depth of 3 inches. The weight of gravel varies by type, with most gravel weighing between 1.4 and 1.7 tons per cubic yard.

Types of Gravel and Their Uses

Different types of gravel are suited for different applications:

• Pea Gravel: Small, rounded stones ideal for walkways, playgrounds, and decorative landscaping
• Crushed Stone: Angular stones that compact well, making them suitable for driveways and pathways
• River Rock: Smooth, rounded stones often used for drainage areas and decorative borders
• Decomposed Granite: Fine-textured material that compacts to create a firm surface for paths and patios
• Base Gravel: Larger stones used as a foundation layer beneath other materials

Factors Affecting Gravel Quantity

Several factors can influence how much gravel you'll need:

• Compaction: Gravel will compact over time, reducing the depth. Consider adding 10-15% extra to account for this
• Irregular Areas: For irregularly shaped areas, divide the space into regular shapes, calculate each separately, and add them together
• Slope: Areas with a slope will require more material than flat surfaces of the same square footage
• Waste: It's always wise to order 5-10% extra to account for spillage, uneven distribution, and other factors

Installation Tips

For best results when installing gravel:

1. Prepare the area by removing vegetation, debris, and topsoil
2. Install landscape fabric to prevent weed growth and keep gravel from mixing with soil
3. Add a base layer of larger stones for drainage if needed
4. Spread gravel evenly and rake to the desired depth
5. Compact the gravel with a plate compactor for driveways or walkways
6. Add edging to contain the gravel and prevent spreading

Maintenance Considerations

Gravel surfaces require periodic maintenance:

• Rake occasionally to maintain an even surface
• Add new gravel every 1-2 years to replace material that has sunk or been displaced
• Remove weeds promptly to prevent them from establishing
• Clean debris like leaves and sticks to maintain appearance