How do I calculate gravel base volume?

Multiply length by width by depth to get cubic feet, then divide by 27 for cubic yards.

Why does density matter in gravel estimates?

Density converts cubic yards to tons. Different materials and moisture levels can change tonnage.

Should I include waste for base material?

Yes. Waste helps cover compaction loss, uneven subgrade, and minor overage during placement.

Can I use this for slab and driveway base layers?

Yes. It works for rectangular base layers when depth is reasonably uniform.

Gravel Base Calculator

Estimate crushed stone, gravel, or sand base volumes for slabs, driveways, patios, and pavers. Use it to plan base thickness, order tons, and include waste for compaction and site loss. For outdoor pours, pair base planning with slab thickness and compaction checks before ordering material. Both concrete slabs and pavers require proper base preparation. Choosing a patio surface? See Concrete vs Gravel Patio for drainage, weed control, and maintenance tradeoffs.

Inputs

Length (ft)

Width (ft)

Depth (in)

Density preset

Waste (%)

Tip: Base material is often compacted. Use a slightly higher waste factor for uneven subgrades or thicker edge bands.

Results

Material estimate

6.11 tons

4.07 yd³ • 110 ft³

Notes

Density varies by material and moisture; confirm with supplier.

Assumptions

Rectangular base area with uniform depth.
Waste factor accounts for compaction loss and uneven subgrade.
Density presets are typical ranges; verify for your material source.

Example

A 30 ft × 10 ft base at 4 inches with 10% waste is 4.07 yd³, or about 6.11 tons using the selected density.

Related Concrete Tools

Concrete Estimating Guide

Complete Concrete Calculator Guide