Concrete Rebar Calculator
Determine rebar requirements for slabs, footings, walls, and columns. Standard sizes and spacing recommendations included.
Frequently Asked Questions
What size rebar for a concrete slab?
Residential slabs typically use #3 or #4 rebar at 16–24 inches on center in a grid pattern.
Do all concrete slabs need rebar?
Not always. Thin walkways and patios can use wire mesh instead. Structural slabs and driveways benefit from rebar.
How much does rebar cost?
Rebar costs roughly $0.75–$1.50 per linear foot for #4 (1/2 inch) residential grade.
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