Structor: Construction Calc.

65+ offline construction calculators for contractors, engineers & DIYers

Structor: Construction Calculator
The all-in-one toolbox for builders. Structor packs 65+ professional construction calculators into a single, fast, fully offline app — built for the realities of the job site.

Whether you are pouring a slab, framing a wall, sizing a beam, running conduit, or estimating paint, Structor gives you accurate numbers, clean material lists, and code-aware guidance in seconds. No signup. No internet. No nonsense.

CATEGORIES
• Concrete — slabs, footings, columns, stairs, rebar, ready-mix
• Framing — studs, joists, rafters, headers, beam sizing
• Roofing — pitch, rise/run, shingles, underlayment, ridge cap
• Plumbing & HVAC — pipe sizing, BTU loads, duct, water flow
• Electrical — wire size, voltage drop, conduit fill, breakers
• Painting — coverage, primer, gallons per room
• Earthwork — excavation, fill, compaction, grading
• General Tools — area, volume, unit conversion, geometry

KEY FEATURES
• 100% offline — works in basements, on rooftops, anywhere
• Metric and imperial units, switch instantly
• 10 languages: English, Spanish, Romanian, German, French, Portuguese, Polish, Turkish,
Arabic, Hindi
• Field Mode — high-contrast, large-button UI for gloves and bright sun
• Job Projects — group calculations by client, address, or job
• Material lists — auto-generated bills of materials, ready to share
• Compliance indicators — flags values that fall outside common code ranges
• Calculation history — every result saved locally, searchable
• Favorites — pin the calculators you use every day
• Voice input — speak dimensions hands-free
• PDF export — share clean reports with clients and inspectors
• Recently used — jump back to your last calculation in one tap
• Calculation chaining — pipe outputs from one calculator into another

BUILT FOR THE PEOPLE WHO BUILD
General contractors, civil and structural engineers, architects, carpenters, framers, plumbers, HVAC techs, electricians, roofers, painters, masons, landscapers, estimators, and serious DIY homeowners. If you measure, cut, pour, or wire - Structor is for you.

DISCLAIMER
All results are estimates intended to support professional judgement. Structor is not a substitute for licensed engineering, local building codes, or qualified inspection. Always verify calculations and consult a qualified professional before purchasing materials or building a structure.

PRIVACY
Structor is built privacy-first. No accounts, no tracking, no cloud sync. Every calculation, history entry, and project stays on your device. The app shows ads through Google AdMob, with anonymous crash reports through Firebase Crashlytics and aggregate usage analytics through Firebase Analytics. We do not collect personal data of any kind.

Download Structor and put a complete construction office in your pocket.