Construction
Concrete Slab Rebar Calculator
Slab dimensions and grid spacing give rebar pieces and total LF.
Total rebar (ft)
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- Bars long way
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- Bars short way
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- 20 ft sticks
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FAQ
What size rebar? +
Number 4 (1/2 inch) for 4 inch slabs, Number 5 (5/8 inch) for thicker slabs or driveways.
Grid spacing? +
18 inch OC is common for residential slabs. 12 inch for heavier loads.