CONCRETE ESTIMATOR
Concrete Driveway Calculator
Estimate the concrete volume for a rectangular driveway using length, width and planned thickness.
Use the calculator →Quick answer
A 20 × 20 ft area at 4 inches thick is about 4.94 cubic yards before extra material.
Your final order should reflect the actual dimensions, conditions, product yield and any buffer you choose.
How the calculation works
Driveways can require substantial concrete volume, so larger results are usually worth comparing with ready-mix delivery instead of hand-mixing bags.
Calculate your actual project
Enter your measurements and see yards plus five bag sizes.
Before you buy
- Measure the actual area and depth.
- Confirm the yield printed on the bag or supplier specification.
- Plan for site variation and spillage.
- For larger pours, compare ready-mix delivery with bagged material and labor.