Rebar Calculator
Estimate steel bars for a reinforced slab grid, bar count, total length, weight, and cost by slab size and rebar spacing.
LIVE CALCULATION
Reorder Bars
0
pieces · amount to order
+0 pieces estimated waste (10%)
Project Summary
Grid Layout-
Total Rebar Length-
Rebar Weight-
Steel Density-
Cost Estimate
Rebar Bars (@ 20 ft)-
Estimated Total-
Calculation Assumptions
Slab Size-
Spacing-
Grid-
Stock Bar-
Waste & Lap-
Pricing BasisNot specified
Counts assume a single layer, two-direction slab grid with bars centered on a full spacing from each edge and continuous foot-length bars. Wastage and lap allowance are rolled into the 10% default — bump it up if your layout calls for splices.
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