Gravel Calculator
Calculate how much gravel you need for driveways, paths, or drainage. Get cubic yards, cubic feet, estimated weight in tons, and bag count.
Cubic Yards Needed
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Cubic Feet
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Est. Tons
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50 lb Bags
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Area Covered
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What is Gravel Calculator?
A gravel calculator estimates how much gravel you need for landscaping, driveways, paths, or drainage projects. It converts your area and depth into cubic yards, cubic feet, weight in tons, and the number of bags needed.
How to use
- 1 Enter the length and width of the area in feet.
- 2 Enter the desired depth in inches.
- 3 Select the coverage type to help estimate usage.
- 4 Click Calculate to get your material estimates.
- 5 Order 10–15% extra to account for settling and uneven ground.
Formula
Example calculation
A 20 ft × 10 ft driveway at 4 inches deep: (20 × 10 × 4) / 324 = 2.47 cubic yards. Weight: 2.47 × 1.4 = 3.45 tons.
Frequently asked questions
How deep should gravel be for a driveway?
4–6 inches is standard for driveways. Use 4 inches for light vehicle traffic and 6 inches for heavier loads.
How deep for a garden path?
2–3 inches is sufficient for foot traffic paths. This provides good coverage and drainage without excessive material.
How many tons of gravel do I need?
The calculator estimates tons based on an average gravel density of 1.4 tons per cubic yard. Actual weight varies by gravel type.
What size gravel should I use?
3/4 inch crushed stone is most versatile. Pea gravel (3/8 inch) is better for paths. Larger stone (1.5 inch) is better for drainage.
How many 50 lb bags equal a cubic yard?
Approximately 54 bags of 50 lb gravel equal one cubic yard. The calculator shows an estimate based on roughly 1 cubic foot per 50 lb bag.