Road Base Calculator

Plan your road or driveway project with precision. This tool calculates the volume and weight of fill material required, accounting for compaction and material density.

Road Length (ft)*

Road Width (ft)*

Base Depth (inches)*

Material Type

Compaction Factor (%)*

Price per Ton (Optional)

1. Volume (ft³) = Length × Width × (Depth / 12) × (1 + Compaction %) 2. Volume (yd³) = Volume (ft³) ÷ 27 3. Weight (Tons) = Volume (yd³) × Material Density

A 100ft x 12ft driveway with 6 inches of road base and 20% compaction: Volume ≈ 26.6 Cubic Yards. Weight ≈ 33.3 Tons (using 1.25 density).

What is a road base?

Road base is the layer of material, typically a mix of crushed stone and dust, that is laid down before paving or as a finished surface for gravel roads. It provides structural integrity and drainage.

How deep should a road base be?

For a typical residential driveway, a base depth of 4 to 6 inches is recommended. For heavy-duty applications like commercial roads or areas with soft soil, 8 to 12 inches may be required.

How much does a ton of road base cover?

One ton of typical road base material (compacted) covers approximately 80 to 100 square feet at a 2-inch depth. This varies based on the density of the specific material used.

Should I account for compaction?

Yes. Road base material is loose when delivered but will lose about 20% of its volume once compacted. This calculator includes an optional compaction factor to ensure you order enough material.

🔗 Related Calculators

📐 Formula

1. Volume (ft³) = Length × Width × (Depth / 12) × (1 + Compaction %) 2. Volume (yd³) = Volume (ft³) ÷ 27 3. Weight (Tons) = Volume (yd³) × Material Density

📝 Example Calculation

A 100ft x 12ft driveway with 6 inches of road base and 20% compaction: Volume ≈ 26.6 Cubic Yards. Weight ≈ 33.3 Tons (using 1.25 density).

❓ Frequently Asked Questions

What is a road base?▼

How deep should a road base be?▼

For a typical residential driveway, a base depth of 4 to 6 inches is recommended. For heavy-duty applications like commercial roads or areas with soft soil, 8 to 12 inches may be required.

How much does a ton of road base cover?▼

One ton of typical road base material (compacted) covers approximately 80 to 100 square feet at a 2-inch depth. This varies based on the density of the specific material used.

Should I account for compaction?▼

Yes. Road base material is loose when delivered but will lose about 20% of its volume once compacted. This calculator includes an optional compaction factor to ensure you order enough material.