Gravel Driveway Calculator

Plan a gravel driveway: how much gravel (volume, weight and cost) you need at your chosen depth.

How the Math Works

The Gravel Driveway Calculator uses a straightforward volume-to-weight conversion formula: tons = L × W × (depth/12) × density ÷ 2000. This equation first calculates the driveway volume in cubic feet by multiplying length (L) and width (W) in feet by depth in inches converted to feet (depth/12). The volume is then multiplied by the material density (typically 100-120 lbs per cubic foot for gravel) to get total weight in pounds, which is finally divided by 2000 to convert to tons since 1 ton equals 2000 pounds.

Practical Applications

To use this calculator practically, measure your driveway's length and width in feet, and determine the desired gravel depth (typically 4-6 inches for driveways). Input these dimensions along with your local gravel density (check with suppliers), then calculate the required tons. This tells you exactly how much gravel to order, preventing both costly under-ordering that delays your project and over-ordering that wastes money on excess material you don't need.

Day-to-Day Use

This calculator saves you significant time and money on everyday home projects. Instead of guessing how much gravel to buy and potentially making multiple trips to the supplier, you can confidently order the exact amount needed. It helps you budget accurately for your driveway project, avoids unnecessary trips to the gravel yard, and ensures your driveway has the proper thickness to handle vehicle traffic without premature deterioration.

Worked example

50×12 ft at 6 in → 300 ft³ = 11.1 yd³ ≈ 15.75 tons.

FAQ