TheElectricalGuy Academy · Free tools
Field-ready calculators for electrical engineers
Practical, mobile-first tools you can trust on site — size it, check it, export a clean PDF. No sign-up, no email, no cost.
Cable Sizing Calculator
Size a cable by ampacity, voltage drop and short-circuit withstand — IEC & NEC.
Open tool →Transformer Sizing Calculator
Size a 1-φ or 3-φ transformer in kVA or MVA — spare capacity, IEC ratings, full-load & fault current.
Open tool →Electrical Unit Converter
Convert power, voltage, current, resistance, frequency and energy — instantly.
Open tool →BESS Capacity & Lifecycle Planner
Size a battery storage system for its full life — capacity, degradation and overbuild.
Open tool →More tools coming
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