Concrete Driveway Calculator
Estimate cubic yards, bags, rebar, and cost for your driveway
Total length of the driveway
Width of the driveway (typical 2-car: 18")
Standard driveway: 4" (use 5-6" for heavy vehicles)
Concrete Volume
—
cubic yards
80 lb Bags
—
bags
Rebar Mats
—
mats
Estimated Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Planning a concrete driveway? Getting the volume, rebar, and cost right up front saves time and money. Our calculator sizes your pour and estimates reinforcement mats in one step.
- Measure the length and width of your driveway in feet
- Set the slab thickness (4" for cars, 5-6" for heavy vehicles)
- Review cubic yards, 80 lb bags, and rebar mat count
- Use the cost estimate to compare ready-mix versus bagged concrete
Expert Insights
Smart analysis for your Concrete Driveway project
Load-Based Thickness
A 4" slab handles cars and SUVs. Step up to 5-6" with rebar for trucks, RVs, or commercial traffic to prevent cracking.
Rebar Grid Sizing
An 8 ft x 8 ft rebar mat grid is standard for residential driveways. Each mat covers 64 sq ft of slab for efficient placement.
Subbase Preparation
A 4-6" compacted gravel subbase drains water and prevents frost heave. Skip it and your driveway will crack within a few seasons.
Calculation Formula
Volume (cu ft) = Length x Width x Thickness / 12
Cubic yards = Volume / 27
80 lb bags = ceil(Volume / 0.6)
Rebar mats = ceil((Length x Width) / (8 x 8))
Estimated cost = ceil(Cubic yards x $6)
Driveway Material Comparison
| Material | Lifespan | Cost per sq ft | Maintenance | Load Rating |
|---|---|---|---|---|
| Concrete (4") | 30-40 years | $4-$10 | Low | Cars, light trucks |
| Concrete (6" + rebar) | 40-50 years | $8-$15 | Low | Heavy vehicles |
| Asphalt | 15-20 years | $3-$7 | High (sealcoating) | Cars, light trucks |
| Pavers | 40-50 years | $10-$25 | Medium | Heavy vehicles |
Authority References
Our calculations are based on guidelines and standards from these authoritative sources:
- American Concrete Institute (ACI) — ACI 330: Guide for Design & Construction of Concrete Parking Lots. Learn more
- Portland Cement Association (PCA) — Residential Concrete Driveways. Learn more
- American Association of State Highway Officials (AASHTO) — Pavement Design Standards. Learn more
Frequently Asked Questions
How thick should a concrete driveway be?
A residential concrete driveway should be at least 4 inches thick for cars and light vehicles. For heavier vehicles like trucks or RVs, use 5-6 inches with rebar reinforcement.
Does a concrete driveway need rebar?
Rebar is recommended for driveways 5 inches or thicker, and for any driveway supporting heavy vehicles. Use #4 rebar in an 8" x 8" or 16" x 16" grid pattern for best results.
How much does a concrete driveway cost?
A concrete driveway costs $4-$15 per square foot installed depending on thickness, reinforcement, and finish. A typical 2-car driveway (18' x 40') runs $3,000-$8,000 fully installed.