Gravel Calculator
Calculate how much gravel you need for your driveway, pathway, or landscaping project. Get results in cubic yards and tons.
How to Calculate Gravel
- Measure the area in feet (length × width). For irregular shapes, break into rectangles and add them up.
- Choose the depth: 4-6 inches for driveways, 2-3 inches for walkways, 1-2 inches for decorative beds.
- Calculate cubic yards: Length × Width × Depth (in inches) ÷ 324 = cubic yards.
- Convert to tons: Cubic yards × density factor (typically 1.4 for crushed stone).
- Add 10% extra for compaction and waste.
Gravel Depth Recommendations
- Driveways: 4-6 inches (base layer of larger stone + top layer of finer gravel)
- Walking paths: 2-3 inches
- Decorative beds: 1-2 inches
- French drain: 8-12 inches depth in the trench
Frequently Asked Questions
How much gravel do I need?
Measure your area in feet (length × width), choose your depth in inches, then use the formula: Area (sq ft) × Depth (in) ÷ 324 = cubic yards. To convert to tons, multiply cubic yards by 1.4 (average gravel density).
How much does a cubic yard of gravel weigh?
A cubic yard of gravel weighs approximately 2,800 pounds (1.4 tons). This varies by type: pea gravel ~2,600 lbs, crushed stone ~2,700 lbs, river rock ~2,900 lbs per cubic yard.
How deep should gravel be for a driveway?
A gravel driveway should be 4-6 inches deep. Use a base layer of 4 inches of larger crushed stone, topped with 2 inches of finer gravel. For foot traffic paths, 2-3 inches is sufficient.
How much does gravel cost?
Gravel typically costs $15-$75 per ton depending on the type, with delivery fees of $50-$150 per load. Crushed stone averages $25-$50/ton, pea gravel $30-$60/ton, and decorative river rock $50-$150/ton.