How do you calculate gravel for a driveway?
Measure the area in square feet, multiply by depth in feet, and divide by 27 to get cubic yards. Then multiply cubic yards by the material density if your supplier quotes by the ton. Add overage after the raw volume is calculated. For landscape beds, paths, or non-driveway projects, use the broader gravel calculator for yards, tons, bags, and cost.
Tons = cubic yards × tons per cubic yard. For layered builds, calculate each layer separately and add the totals.
How deep should driveway gravel be?
For an existing stable driveway, a 2 inch top-off can be enough. Ruts or low spots often need closer to 3 inches. A new driveway usually needs a stronger base and a separate driving surface, and the right total depth depends on soil, drainage, vehicle load, and grading.
Should you top off, repair, or rebuild?
Top off when the driveway is thin but still firm. Repair when ruts, potholes, or low areas need filling before the surface layer. Rebuild when gravel is mixing into soft soil, water sits on the driveway, or contractors are discussing excavation, fabric, grading, base rock, or haul-off.
Cubic yards vs tons: which number should you order with?
Order in the unit your supplier uses. Landscape yards may quote by the cubic yard, while quarries and aggregate suppliers often quote by the ton. This page shows both because density varies by stone type, fines, moisture, and local material.
What gravel type works best for driveways?
Angular crushed stone is usually more stable for vehicles because it interlocks. Round river rock and pea gravel can look clean, but they roll and migrate more easily. Materials with fines, such as #411, DGA, quarry process, or crusher run, can compact into a tighter surface, while cleaner stone drains more freely.
How much does gravel driveway material cost?
The calculator uses your local material price, delivery fee, and tax because driveway gravel prices vary by region and distance from the supplier. For quote checking, compare the total scope: stone quantity, grading, fabric, spreading, compaction, equipment, and any old material haul-off. If you are comparing retail bags against a bulk delivery quote, use the bulk vs bagged cost calculator after you know the driveway volume.
What mistakes should you avoid before ordering driveway gravel?
- Ordering by cubic yards when the supplier quote is actually by the ton.
- Forgetting the garage apron, turnaround, shared drive, or parking pad.
- Using round decorative stone where compacted angular stone is needed.
- Ignoring drainage, crown, soft subgrade, or fabric on a failing driveway.
- Comparing contractor quotes that include different depths or scope items.
What sources and assumptions does this calculator use?
This calculator uses standard volume math, editable tons-per-cubic-yard density presets, and driveway-specific ordering assumptions. For aggregate and surfacing context, compare your result against references from Penn State Center for Dirt and Gravel Road Studies materials calculator, NRCS Earth and Aggregate Surfacing Design Guide, Calculator Soup gravel calculator. Local suppliers can still use different densities, names, delivery minimums, and material blends.