Concrete Slab Cost Estimator
Estimate the total cost of pouring a concrete slab, including concrete material, labor, reinforcement, and finishing costs.
Formulas Used
Slab Area (sq ft):
Area = Length × Width
Concrete Volume (cubic yards):
Volume (cu yd) = (Length × Width × Thickness_in_inches / 12) / 27
Volume with Waste:
Adjusted Volume = Volume × (1 + Waste% / 100)
Concrete Material Cost:
Concrete Cost = Adjusted Volume (cu yd) × Price per Cubic Yard
Labor Cost:
Labor Cost = Area (sq ft) × Labor Rate ($/sq ft)
Rebar Cost (if selected):
Rebar Cost = Area (sq ft) × $0.75/sq ft
Finishing Cost:
Finishing Cost = Area (sq ft) × Finish Rate ($/sq ft)
Total Cost:
Total = Concrete Cost + Labor Cost + Rebar Cost + Finishing Cost
Cost per Square Foot:
Cost/sq ft = Total Cost / Area
Assumptions & References
- Concrete is priced per cubic yard; typical U.S. range is $110–$165/cu yd (2024).
- Labor rates typically range from $1.50–$4.50/sq ft depending on region and complexity.
- A 10% waste/overage factor is standard industry practice to account for spillage and uneven subgrade.
- Rebar reinforcement estimate of $0.75/sq ft covers #3 or #4 rebar on 18-inch centers for a standard residential slab.
- Finishing costs: Broom finish is included in labor; exposed aggregate ~$0.50/sq ft extra; stamped ~$1.50/sq ft extra; polished ~$3.00/sq ft extra.
- This estimate does not include site preparation, gravel base, forms, permits, or equipment rental.
- Standard residential slabs are typically 4 inches thick; driveways 4–6 inches; structural slabs 6+ inches.
- 1 cubic yard = 27 cubic feet.
- References: RSMeans Building Construction Cost Data; National Ready Mixed Concrete Association (NRMCA); HomeAdvisor Cost Guides.