Rebar Calculator
Estimate reinforcing-bar grid lines, total length, stock pieces, intersections, tie wire and material cost for a rectangular slab.
Default project preview
19 stock bars
Long-direction lines
9
Cross-direction lines
14
Grid intersections
126
Estimated bar weight
247.3 lb
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Grid lines = round up (clear dimension ÷ spacing) + 1. Total length = lines × perpendicular clear length, then lap and cut allowance is applied. Stock bars are rounded up.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Rebar Calculator questions
Does every rebar intersection need a tie?+
Tie requirements depend on the reinforcement plan and placement method. The intersection count is a planning reference.
What edge cover should be used?+
Required concrete cover depends on exposure, placement against soil, member type and code.
Does this calculate rebar design?+
No. Bar size and spacing must come from an approved structural design.