EnerMath

EnerMath — free electrical calculations for every builder and engineer. Whether you are a licensed electrician on site, an engineering student, a solar DIYer, or maintaining electrical systems, EnerMath gives you fast, offline estimates without ads, subscriptions, or tracking. WHAT YOU CAN CALCULATE • Ohm’s Law (AC/DC) • Single-phase & three-phase power • DC and AC voltage drop with NEC-oriented 3% / 5% guidance • AWG ↔ mm², ampacity estimates, conductor helpers • Power factor and capacitor sizing (kvar) • Battery runtime and series-parallel bank planning • Transformer and motor FLC helpers • Unit conversion, energy cost, resistor color code BUILT FOR REAL-WORLD WORKFLOWS • Imperial & metric units (AWG/mm², ft/m, °F/°C) • Save calculations locally and export as plain text • Offline reference charts: AWG tables, motor FLC, wiring color codes, formula cheat sheet • Multiple color themes with Light and Dark modes PRIVACY BY DESIGN • No account required • No ads, no in-app purchases, no tracking • All settings and records stay on your device (UserDefaults) • Works fully offline — no internet needed IMPORTANT EnerMath provides estimation tools only. Results do not replace professional electrical engineering judgment, licensed on-site inspection, or compliance with NEC, IEC, and your local electrical codes. Download EnerMath and keep essential electrical math in your pocket — free, clear, and colorful.