Concrete Anchor Bolt Calculator
Estimate anchor-bolt quantity, average installed spacing, package count and material cost around a rectangular concrete perimeter.
Default project preview
14 bolts
Bolt packages
2
Concrete perimeter
80 ft
Average spacing
5.71 ft
Length-side segments
4
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.
Each side is divided into segments no longer than the entered maximum spacing. For a closed rectangular perimeter, total perimeter bolts equal twice the sum of length-side and width-side segments, plus entered extras.
FAQ
Concrete Anchor Bolt Calculator questions
Why are corner bolts not added four more times?+
The closed-loop segment method counts each corner once while preserving the maximum spacing along every side.
Does this determine bolt embedment?+
No. Embedment, diameter, edge distance and hardware depend on loads, concrete strength and the approved connection design.
Should openings receive extra bolts?+
Many wall openings, splices or hold-down locations need additional anchors. Enter those separately from regular perimeter spacing.