Rebar Spacing Calculator
Calculate total rebar linear footage, bar count by direction, and estimated weight for a concrete slab.
Weight: 0.668 lbs/ft
Slab area: 400 sq ft
Total Rebar Length840LF
Bars Running Lengthwise (20 ft)21bars
Bars Running Widthwise (20 ft)21bars
Estimated Weight561lbs
Placement note: Add 10 to 15% for laps and waste. Typical lap splice length is 25 bar diameters. Maintain 3 in of concrete cover minimum from slab edge to rebar per ACI 318.