Watts vs Electrician Pro

Small simple easy to use calculator to determine how much electrical devices cost to run over time.

Electrician Pro is a professional electrical calculator and field toolkit built for electricians, electrical engineers, technicians, apprentices, and students. Get fast, reliable calculations wherever you work — on the job site, in the workshop, or while studying. No internet connection required. From Ohm’s Law and power calculations to voltage drop, wire sizing, conduit fill, motors, transformers, and 3-phase systems, Electrician Pro puts the essential tools you need in one place. CORE CALCULATORS — FREE • Ohm’s Law — Calculate voltage, current, resistance, and power • Power Calculator — Calculate watts, VA, kW, and power factor • Unit Converter — Convert common electrical and length units • kW ↔ HP — Quickly convert between power units • AWG ↔ mm² — Convert wire sizes between common standards ADVANCED FIELD TOOLS — PRO Unlock the complete toolkit with 12 advanced calculators and reference tools: • Voltage Drop — Calculate voltage drop and percentage • Wire Size — Select conductor sizes based on NEC requirements • Conduit Fill — Check conduit capacity and fill • Box Fill — Calculate NEC box fill requirements • 1-Phase & 3-Phase Power — Calculate line, phase, and total system values • Motor Calculator — Calculate motor FLA and power requirements • Power Factor — Calculate PF, kW, kVA, and kVAR • Transformer — Calculate turns ratios and primary/secondary currents • Resistor Colors — Decode 4, 5, and 6-band resistors • Cable Comparison — Compare technical specifications across wire sizes • Conduit Bending — Calculate offset, stub, and saddle bends WHY ELECTRICIAN PRO? • 100% Offline — Work without Wi-Fi or mobile data • Fast — Enter your values and get results instantly • Professional — Built around established electrical formulas and NEC-based calculations • Practical — Designed for real-world electrical work, not complicated menus • Global — Available in 10 languages, including English, Arabic, Chinese, Japanese, Korean, Spanish, French, German, Italian, and Portuguese Whether you’re installing circuits, sizing cables, checking voltage drop, working with motors, or studying electrical engineering, Electrician Pro gives you the calculations you need when you need them. Calculate smarter. Work faster. Carry your electrical toolkit wherever you go.