Slab Rebar Concrete Calculator

What's new in 1.3.0 — bigger text, safer number entry, and a round of fixes. - Text now follows your system text size (Dynamic Type), with layouts that adapt at larger sizes - Opening a saved project keeps its exact mix ratio, dimensions, and prices — nothing is quietly changed on load - Duplicate project now copies everything, including pricing and rebar settings - Corrected rebar weight for rectangular footings, and the excavation volume when switching between imperial and metric - Multi-page PDF export: long cut lists and quotes no longer run off the page - Smarter number entry: negative or invalid values are flagged instead of silently treated as zero, and decimal commas work in French and German - Your edits are never lost when a save fails before opening another project - Larger tap targets, better VoiceOver labels, and Reduce Motion support - Safer startup: if saved projects can't be opened, SlabKit starts normally and tells you instead of crashing - Updated translations in German, French, Korean, and Japanese Still 100% offline. No accounts, no ads, no tracking.

What does SlabKit do? SlabKit calculates rebar grid takeoffs, structural rebar design, wire mesh sheet counts, concrete volume, and a full set of jobsite estimators — all offline on your iPhone. Built for residential concrete contractors, framers, masons, estimators, 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), with independent length/width spacing - Design structural rebar for columns, walls, and footings — bar size, spacing, and hook length from your load and dimensions - Estimate sheets of welded wire fabric (WWF) or rolls with adjustable overlap - Compute concrete volume for slabs, strip and pad footings, square columns, cylindrical tubes, walls, stairs, circular slabs, curbs, and post holes - Design a stairs run with code-compliance checks — riser/tread limits, stringer length, landing angle - Square up a layout with the 3-4-5 method, or plan a stepped-footing drop on sloped ground - Estimate formwork lumber, excavation volume, gravel base, block wall units and mortar, and asphalt tonnage - Count 40, 50, 60, and 80 lb (or 25 kg) bags of concrete mix, or ready-mix truckloads with short-load warnings - Design a concrete mix to US (ACI), UK/EU (BS/EN), or Indian (IS) standards - Save your local material and supplier prices in a reusable price library - Track curing with optional Day 1/3/7/28 reminders, and log test cylinders against a lab schedule - Add a waste factor and round up automatically - Save unlimited projects with custom names - Export a client quote or a formal Bill of Quantities (BOQ) 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 mix design follows ACI 211, BS 8500 / EN 206, and IS 456. Stairs follow IRC tread/riser limits. All estimates are for planning — always confirm with your structural engineer or local building official. What languages does it support? English, German, French, Korean, 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. Terms of Use: https://taxlite.net/slab_kit/terms.html Privacy Policy: https://taxlite.net/slab_kit/privacy.html