How to Calculate Concrete for a Driveway

Quick answer

Multiply driveway length by width by thickness in feet, then divide by 27 to convert cubic feet to cubic yards. Split irregular driveways into measurable sections.

Use the related calculator

Step by step

Measure each section. Use feet and separate rectangular areas.
Convert thickness. Divide inches by 12.
Calculate volume. Multiply length × width × thickness.
Convert and review. Divide by 27, then confirm allowance and ordering requirements.

Formula or rule of thumb

cubic yards = length(ft) × width(ft) × thickness(ft) ÷ 27

Example

A 40 ft × 12 ft driveway at 5 in thick is about 7.41 yd³ before an allowance.

Common mistakes

Do not use a generic thickness without checking the project design, base conditions and local requirements.

Planning note: product yields, installation methods, site conditions and local requirements can change the final quantity. Use the exact manufacturer or supplier information before purchasing.

FAQ

Should driveway thickness be uniform?

The design may vary by site, loads and reinforcement; confirm with a qualified professional.

Can I use this for an apron?

Calculate the apron as a separate section and add it to the driveway volume.

Is this an engineering design?

No. It is a material-planning estimate only.