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ElecCalcs — Electrical & Mechanical Calculators
NEC-referenced electrical calculators: voltage drop, conduit fill, wire sizing, ampacity, box fill and breaker sizing. Every result shows its formula and cod...
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87 % |
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Electrical Charts & Calculators | ElectricalCharts
Free voltage drop, conduit fill and ampacity calculators plus wire gauge, sheet metal, rebar, socket and thread charts. Formula-derived, sources shown.
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85 % |
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NEC Electrical Calculators, Charts and Field Answers
Route into ElectraKit calculators, NEC reference charts, field guides, glossary definitions and curated direct-answer pages for US electrical sizing work.
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85 % |
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NEC Electrical Calculators for Wire Size, Voltage Drop & Ampacity
Free NEC electrical calculators for wire size, voltage drop, ampacity, feeder sizing, conduit fill, and electricity cost. Built for US electricians, apprenti...
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84 % |
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Electric Helper – NEC electrician calculator app for iOS & Android
39 NEC calculators for electricians: wire size, voltage drop, conduit and box fill, fault current, EV charger, generator and solar sizing, dwelling loads, co...
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84 % |
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Wire Size Calculator
Free NEC wire size calculator. Find the right AWG by ampacity and voltage drop — copper or aluminum, single- or three-phase. Runs in your browser, no sign-up.
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83 % |
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JobsiteWire — Free Electrician Calculators
Free electrician calculators built for the jobsite: voltage drop, wire size, conduit fill, box fill and EV charger circuits. Fast, mobile-first, no signup.
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83 % |
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Electrical & HVAC Calculators With Code Shown
Free home electrical and HVAC calculators with the math shown: voltage drop, wire size, breakers, BTUs, mini splits, generators, and solar sizing.
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83 % |
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WireRef: NEC Wire Sizing, Ampacity & Code Reference
Free NEC electrical reference for electricians and apprentices. Wire sizing, ampacity tables, GFCI requirements, calculators, and code lookup for all 50…
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82 % |
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Free Electrical & Wiring Calculators | WiringCalcs
NEC-compliant electrical calculators for wire sizing, conduit fill, voltage drop, and more. Free tools built for electricians and DIYers.
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82 % |
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Free Electrical Calculators for Electricians
Professional electrical calculators for voltage drop, cable sizing, Ohm's law, conduit fill and more. Free tools online + the full toolkit in the Voltix app....
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82 % |
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VoltForge | Electrical Design. Engineering. Resources.
Code-cited UL 508A and NEC sizing answers for industrial control panel engineers.
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82 % |
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AmpSizer - Wire Size & Ampacity
Wire size, ampacity, voltage drop and conduit fill calculators built on published 2023 NEC tables, from 14 AWG to 2000 kcmil in copper or aluminum.
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82 % |
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Ohmla — Wire Size & Voltage Drop Calculator (NEC Compliant)
Free instant wire gauge, voltage drop, and ampacity calculators built on NEC 310.16 and Chapter 9 Table 8. Get the exact AWG size for any amperage, voltage,...
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81 % |
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CalcRig - Free Professional Trade Calculators
67 free trade calculators for electricians, plumbers, HVAC techs and contractors. Wire sizing, voltage drop, BTU, conduit fill, pipe sizing and more.
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81 % |
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Electrical Calculators & Reference Tools | Elecatrix
Free U.S. electrical calculators and reference tools for conduit bending, wire sizing, load estimates, motors, circuits, lighting, and field checks.
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81 % |
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FieldsCalc — Free Calculators for the Trades
Free, fast calculators for electrical, HVAC, and plumbing sizing — no sign-up, no clutter, built for the jobsite.
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81 % |
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Free Electrical Calculators for Electricians | Ampxa
Free electrical calculators: voltage drop, conduit fill, box fill, Ohm's law, ampacity, breaker and fuse sizing, motor current, transformer and generator siz...
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81 % |
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Free NEC Electrical Calculators | ElectricalToolbox
Free NEC calculators for licensed electricians: voltage drop, wire sizing, ampacity, and conduit fill. Every result cites the NEC table and article.
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80 % |
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Broelectric | Electrical Code, Calculators & Field Tools
Practical electrical calculators, code guidance, installation guides, troubleshooting, and field references for working electricians.
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80 % |
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