SlabKit: Rebar, Mesh, Concrete

Calculate rebar grids, wire mesh sheets, and concrete volume for slabs, footings, and columns. 100% offline. Lifetime purchase available.

What does SlabKit do? SlabKit calculates rebar grid takeoffs, wire mesh sheet counts, and concrete volume for any slab, footing, column, or sonotube — all offline on your iPhone. Built for residential concrete contractors, framers, masons, and DIY pours.

Is my data private? 100% offline. Nothing leaves your iPhone. No accounts, no analytics, no ads, no third-party tracking.

How do I get started?

1. Open a tab: Slab, Mesh, or Concrete
2. Enter your dimensions in imperial or metric
3. Read the takeoff and save the project or export a PDF

What can I do with it?

• Lay out a rebar grid on any rectangular slab and get bar count, total linear length, weight, and number of standard-length sticks required (including lap overlap)
• Configure bar size, on-center spacing, edge clearance, and lap multiplier per local code
• Estimate sheets of welded wire fabric (WWF) or rolls with adjustable overlap
• Compute concrete volume for slabs, strip and pad footings, square columns, and cylindrical tubes
• Count 40, 50, 60, and 80 lb (or 25 kg) bags of concrete mix for fast-setting pours
• Add a waste factor and round up automatically
• Save unlimited projects with custom names
• Export takeoff sheets as PDF for the jobsite or the supplier
• Switch between imperial (#3-#8 bar, ft/in, cubic yards, lb) and metric (8-32mm bar, m/mm, cubic meters, kg)

What standards does it cover? Rebar sizes follow ASTM A615 (US) and BS 4449 / EN 10080 (metric). Concrete volumes use standard geometric formulas with an adjustable waste factor. Estimates are for planning — always confirm with your structural engineer or local building official.

What languages does it support? English, German, French, Spanish, and Japanese.

How much does it cost? 3-day free trial, then $1.99/week, $4.99/month, $29.99/year, or $79.99 lifetime.

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