Gravel Calculator

Work out how much gravel you need for a path, base layer or landscaping project — in cubic yards, tons and cost. Gravel is usually sold by the ton or cubic yard.

How the Math Works

The Gravel Calculator uses the formula tons = (L × W × depth/12) × density ÷ 2000 to determine how much gravel you'll need. First, it multiplies the length (L) and width (W) of your area to get the square footage, then multiplies by the depth in inches divided by 12 to convert to feet. This gives you the volume in cubic feet. The calculator then multiplies by the density (typically 1.35 tons per cubic yard for gravel) and divides by 2000 to convert from pounds to tons, since density is often measured in pounds per cubic foot.

Practical Applications

To use this calculator practically, simply measure the length and width of the area you want to cover with gravel, and determine how deep you need the gravel layer (typically 2-4 inches for walkways, 3-6 inches for driveways). Enter these measurements along with the density value (which varies by gravel type) into the calculator. It will instantly tell you the total volume in cubic feet, weight in tons, and often the cost based on local pricing per ton. This saves you from manually calculating and helps you order the right amount to avoid costly returns or project delays.

Day-to-Day Use

This calculator is invaluable for everyday projects around your home or property. Whether you're installing a new gravel driveway, creating a garden path, building a rabbit hutch base, or preparing a patio area, knowing exactly how much gravel to purchase prevents both shortages that halt your project and excess that wastes money. It's especially useful for DIY homeowners, landscapers, and contractors who need quick, accurate estimates for materials. By calculating costs upfront, you can budget effectively and compare prices between suppliers, ensuring your gravel project stays on track and within budget.

Worked example

20 ft × 10 ft at 4 in deep → 66.7 ft³ = 2.47 yd³; at 105 lb/ft³ ≈ 3.5 tons.

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