Formula
How this estimate works
cubic yards = area x depth in feet / 27; tons = cubic yards x density
A 60 ft by 10 ft driveway at 4 in deep with 10% waste needs about 8.15 cubic yards.
Driveway gravel depth
Driveways often need more than a thin surface layer. Base layers, traffic load, soil conditions, and drainage can all affect required depth.
Use area and depth together
Measure driveway length and width, choose the planned depth, then convert volume to cubic yards and estimated tons.
Assumptions used
- Default densities are planning estimates for common gravel materials.
- Tonnage changes with moisture, compaction, and aggregate size.
- Waste factor is useful for spreading loss and uneven subgrade.
Before you order materials
- Separate base layers from surface layers.
- Confirm depth for traffic load and soil conditions.
- Use angular stone or road base where compaction matters.
Frequently asked questions
How deep should driveway gravel be?
Depth varies by project and base condition. Many driveways need multiple layers rather than a single thin layer.
What material should I choose?
Road base or crushed stone is often used for base layers, while decorative gravel may be used on top.
Does compaction change the estimate?
Yes. Compaction can reduce finished depth, so confirm material and compaction assumptions with your supplier.