Concrete Rebar Calculator
Calculate how much rebar you need for your concrete project with our comprehensive calculator. Determine rebar quantities, spacing, and total project costs based on your specifications.
Step 1: Slab Dimensions
Standard Slab Depths
Residential slabs are typically 4-6 inches thick. Driveways and garages may require 6-8 inches. Commercial slabs can be 8-12 inches or more depending on load requirements.
Step 2: Rebar Configuration
Rebar Spacing Guidelines
Standard spacing is 12″ on center for residential slabs. For heavy loads or commercial applications, use 6-8″ spacing. Always consult local building codes for specific requirements.
Rebar Calculation Results
Estimated Total Project Cost
Rebar Size Comparison
| Rebar Size | Diameter | Weight (lb/ft) | Typical Use | Total Cost |
|---|
Rebar Layout Details
Rebar Calculation Formula
Rebar Calculation Formula
Bars in one direction = (Dimension in feet × 12) / Spacing in inches + 1
Total rebar length = (Bars in long direction × Width) + (Bars in short direction × Length)
Add 10% for overlaps and waste, then multiply by price per linear foot.
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