Gravel Calculator - Calculate Gravel for Driveways and Paths

Understanding Gravel Calculations

Gravel is essential for driveways, pathways, drainage, and landscaping. Calculating the correct quantity ensures proper coverage, drainage, and cost efficiency. Gravel is sold by weight (tons) or volume (cubic yards), and understanding the conversion between these units is crucial for accurate ordering.

Gravel Depth Guidelines

Driveways: 4-6 inches for light vehicles, 6-8 inches for heavy vehicles. Pathways: 2-3 inches for foot traffic. Drainage: 4-6 inches minimum. Decorative landscaping: 2-3 inches. Base layer: 4-6 inches of larger stone, topped with 2-3 inches of smaller gravel. Proper depth prevents rutting and ensures longevity.

Gravel Types and Density

Pea gravel: 1.4 tons per cubic yard, smooth, decorative. Crushed stone: 1.5 tons per cubic yard, compacts well for driveways. River rock: 1.3 tons per cubic yard, decorative. Decomposed granite: 1.4 tons per cubic yard, compacts firmly. 3/4 inch crushed: Most common for driveways. Different gravel types have different weights and applications.

Calculating Gravel Quantity

Formula: Cubic yards = (Length × Width × Depth) / 27. Convert depth to feet. Then convert to tons: Tons = Cubic yards × Density. Example: 20 ft × 10 ft driveway at 4 inches deep = (20 × 10 × 0.33) / 27 = 2.44 cubic yards. At 1.5 tons/yard = 3.67 tons. Round up to 4 tons.