How to Calculate Gravel for a Driveway
Multiple layers, greater depth, and vehicle-load considerations
Driveways typically need more depth than a path
A driveway supports vehicle weight repeatedly over time, so it's typically built with a greater total gravel depth than a decorative path or garden bed — often in the range of 4-8+ inches total, sometimes in multiple layers of different stone sizes (a larger base layer topped with a smaller, more finished surface layer). Soil conditions and expected vehicle weight both affect how much depth is appropriate for a specific driveway.
Calculate each layer separately
If your driveway design uses a coarser base layer and a finer top layer, calculate each as its own area × depth volume, exactly as you would for a paver base and bedding sand — different materials, different depths, added together only after each is calculated with its own density.
Width and length together
Driveway area is length × width, but don't forget to include any turnaround or parking pad areas as separate rectangular sections if the driveway isn't a simple uniform-width strip.
Worked Example
A 12 ft × 60 ft driveway, 6 in of base gravel at 1.4 tons/yd³.
Area: 12 × 60 = 720 ft²
Volume: 720 × (6/12) = 360 ft³ = 13.3 yd³
Weight: 13.3 × 1.4 ≈ 18.6 tons
Related Calculators
Related Guides
From the Blog
Sources
NIST SP 811
Unit conversion reference (cubic feet, cubic yards, cubic metres).
NIST SP 811 — reference