Concrete Crack Repair Cost Estimator
Estimate the total cost to repair concrete cracks based on crack dimensions, repair method, material costs, and labor rates.
Formulas Used
1. Crack Volume:
Volume (in³) = Length (ft) × 12 × Width (in) × Depth (in)
Volume (ft³) = Volume (in³) ÷ 1,728
2. Material Cost:
Material Cost ($) = Volume (ft³) × Material Unit Cost ($/ft³)
3. Labor Cost:
Labor Hours = Labor Hours per Linear Foot × Length (ft)
Labor Cost ($) = Labor Hours × Labor Rate ($/hr)
4. Subtotal:
Subtotal ($) = Material Cost + Labor Cost
5. Overhead & Profit:
Markup Cost ($) = Subtotal × (Markup % ÷ 100)
6. Total Cost:
Total ($) = Subtotal + Markup Cost
7. Cost per Linear Foot:
Cost/ft ($) = Total Cost ÷ Length (ft)
Assumptions & References
- Crack geometry is approximated as a rectangular prism (length × width × depth).
- Routing & Sealing: Uses polyurethane or epoxy sealant at ~$100/gallon; 1 gallon ≈ 231 in³. Labor ~0.05 hr/linear ft. Best for non-structural, surface cracks ≤ 1/4 in wide. (ACI 224.1R)
- Epoxy Injection: Two-component epoxy resin at ~$200/gallon. Labor ~0.10 hr/linear ft including port installation, injection, and cure monitoring. Restores structural integrity. (ACI 503.7)
- Cement Grout / Hydraulic Cement: ~$35/ft³ of mixed grout. Labor ~0.08 hr/linear ft. Suitable for active water-leaking cracks. (ICRI Guideline 310.1R)
- Polyurea Foam Injection: Expanding polyurea foam at ~$150/gallon. Labor ~0.06 hr/linear ft. Used for soil-stabilizing and waterproofing applications.
- Material unit costs are converted from $/gallon to $/ft³ using: 1 ft³ = 1,728 in³; 1 gallon = 231 in³ → 1 ft³ ≈ 7.48 gallons.
- Labor rates vary by region; the default of $65/hr reflects a U.S. national average for concrete repair technicians (RS Means 2023).
- Overhead & profit markup of 15–25% is typical for general contractors (RS Means Cost Data).
- Estimate does not include surface preparation (grinding, cleaning), traffic control, permits, or mobilization fees, which can add 10–30% to total cost.
- For cracks wider than 1 in or showing active movement, consult a licensed structural engineer before repair.