Gravel Driveway Calculator
Calculate the total volume in cubic yards and weight in tons of gravel or aggregate required to build or resurface a driveway.
Calculation Results
Total volume of gravel needed in cubic yards, including waste.
Total weight of gravel needed in tons.
How This Calculator Works
To use the Gravel Driveway Calculator:
- Enter the length and width of the driveway.
- Specify the depth of the gravel (typically 4 inches is recommended for a fresh resurfacing layer, or 8 to 12 inches for a new driveway base).
- Specify the material density (1.4 tons/cu yd is standard for crushed driveway stone).
- Include a compaction/waste factor. 10% is recommended because gravel compresses under compaction rollers and heavy vehicular traffic.
Formula & Calculations
Gravel driveway volume is calculated using physical dimensions, converted to cubic yards and including a compaction/waste factor:
Volume (Cubic Yards) = ((Length × Width × Depth) / 27) × (1 + Waste / 100)
Weight is calculated by multiplying the cubic yard volume by the density of the gravel (expressed in tons per cubic yard):
Weight (Tons) = Volume (Cubic Yards) × Density
For standard crushed limestone driveway gravel (like #57 or Crusher Run), the average density is approximately 1.4 tons per cubic yard. A waste factor of 10% to 15% is standard to cover compaction under vehicular tires.
Step-by-Step Calculation Examples
Standard Single-Car Driveway
A driveway measuring 50ft long by 12ft wide, filled with a 4-inch resurfacing layer of gravel, assuming standard density (1.4 tons/cu yd) and 10% compaction waste.
- length: 50
- width: 12
- depth: 4
- density: 1.4
- waste: 10
- volume_cu_yd: 8.15 cu yd
- tons_needed: 11.41 tons
Frequently Asked Questions
How deep should a gravel driveway be?
A new gravel driveway should be between 8 and 12 inches deep, installed in three separate compacted layers. For an existing driveway that just needs a fresh surface refresher layer, a depth of 2 to 4 inches is standard.
What is the best gravel for a driveway surface?
The most popular driveway surfacing gravel is #57 stone (3/4-inch angular crushed stone) or "Crushed Run" (also known as Quarry Process, which is a mix of 3/4-inch stone and stone dust that packs into a solid surface).
How much does a truckload of gravel cost?
Gravel costs between $15 and $50 per ton depending on the type and location. A standard dump truck holds about 15 to 22 tons of gravel, so a full truckload typically costs between $300 and $1,000 delivered.
How do you prevent weeds from growing in a gravel driveway?
To prevent weeds, install a heavy-duty woven geotextile fabric beneath the base layer of gravel. Ensure the driveway has a crown (raised center) so water drains to the sides, which deprives weed seeds of moisture.
Why does driveway gravel need a compaction factor?
Driveway gravel has sharp, angular facets. When driven over by heavy vehicles, these facets slide past each other and lock together, packing tightly. This compaction reduces the overall volume of the stone, meaning you need to buy 10-15% more material to achieve the desired thickness.