Whether you're a licensed electrician, electrical engineer, electronics hobbyist, or student, Electronic Engineer puts over 1,100 formulas and 24 reference tables in your pocket. No internet required. No ads. Just fast, accurate calculations when you need them.
1,100+ Calculators across 29 Categories:
• Ohm's Law: Complete voltage, current, resistance, and power calculations across 12 formulas
• Voltage Divider: Output voltage, resistor values, current, and power dissipation
• Three-Phase Power: Balanced systems, Wye (Star) and Delta connections
• LED Circuits: Series resistor selection, power dissipation, and max LEDs in series
• 555 Timer: Astable and monostable modes with frequency, duty cycle, and timing
• RLC Circuits: Resonant frequency, Q factor, bandwidth, impedance, and reactance
• Op-Amp Circuits: Inverting, non-inverting, differential, and voltage follower
• Filter Design: RC and RL low-pass, high-pass, and bandpass filters
• Power Triangle: Real, reactive, and apparent power with PF correction sizing
• ACDC: Comprehensive AC/DC circuit calculations across 12 subsections
• Voltage Drop, Motors, Transformers, Capacitors, Inductors, Batteries, UPS, Lighting, and more
400+ Unit Conversion Formulas in 19 Categories:
• BTU, Cubic, Flows, Frequency, Ft-Lbs, Horsepower, HVAC, Hydraulic, Joules, Linear, Liquid, Metric (460 conversions), Power, Pressures, Square Measures, Watts, and Weights
• Plus 8 temperature scales: Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Newton, Delisle, and Rømer
24 Professional Reference Tables:
• AWG Wire Gauge, NEC Ampacity, Resistor Color Codes, Standard Resistor Values (E-Series)
• Circuit Breaker Sizes, Wiring Color Codes (NEC/IEC), Logic Gates Truth Tables
• Transformer Connections, Power Factor Reference, Conductor Properties
• Semiconductor Pinouts, SI Prefixes, NEMA Enclosures, IP Ratings, Decibel Reference
• Ampacity Derating, Standard Capacitor Values, Cable Types, Fuse Classes, and more
Professional Features:
• US and Metric (SI) unit toggle with dual-unit display
• Save and compare calculation results
• Favorite frequently used calculators for one-tap access
• Share and export results to colleagues
• Searchable reference tables with filtering
• Dark mode interface — designed for job sites and the field
• Works offline — no internet required
Electronic Engineer is FREE to download with access to 16 calculator categories and all reference materials. Upgrade to Pro to unlock additional categories and premium features.
Every calculator provides detailed breakdowns showing you exactly how results are calculated. Input your values, get instant results, and understand the engineering behind every calculation.
Core Electrical Engineering (Free):
Pro Calculators:
Additional Categories:
Access essential electrical engineering data right from your phone. No more searching through code books or carrying heavy references to the job site.
24 Reference Tables:
400+ Conversion Formulas:
8 Temperature Scales:
