BuildWire Calc
Offline calculators for electricians and builders: wire size, voltage drop, concrete, roof pitch and HVAC tools that keep working on site with no signal.
buildwirecalc.com
About BuildWire Calc
BuildWire Calc is a phone app of offline trade calculators for people who work on site; they keep working with no signal. Electrical: voltage drop, wire size, breaker size, load, Ohm's law, three-phase power and conduit bending. Construction: concrete slab, footing, rebar, roof pitch and stairs. HVAC: BTU, CFM, duct size and superheat. Save a job and share it as PDF, CSV or text. No ads and no account needed. It is available on iPhone and Android plus a web version. Free tier; Pro unlocks the rest.
Key features
- Voltage drop, wire size and breaker size calculators
- Concrete, rebar, roof pitch and stair calculators
- HVAC BTU, CFM and duct size tools
- Works fully offline on the job site
- Save jobs and export as PDF, CSV or text
Who is this website for?
Electricians, contractors and HVAC technicians who need quick, reliable trade calculations on the job site.
What can visitors do here?
Work out voltage drop and wire size for a circuit, size a concrete slab or rebar layout, then save the job and export it as PDF, CSV or text.
What makes it different?
Trade calculators across electrical, construction and HVAC that work fully offline, with no ads and no account.
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