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, conduit bending. Construction: concrete slab, footing, rebar, roof pitch, stairs. HVAC: BTU, CFM, duct size, superheat. Save a job and share it as PDF, CSV or text. No ads, no account. Free on iPhone and Android; Pro unlocks the rest. Contact support@buildwirecalc.com.

BuildWire Calc

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