Electrical Eng Calculator Pro

This Electrical Engineering Calculator features over 100 tools for industrial power, circuits, and math. If you want a verified library of accurate, professional electrical formulas and calculators, this app is for you. See the bottom of this description for the full list of calculators.

Features:
• Electrical engineering calculations
• Transformer calculations
• Motor current calculations
• Three-phase power calculations
• Voltage drop tools
• Power factor calculations
• Cable and conductor calculations
• Electrical conversion utilities
• Electrical power formulas and calculations
• Three-phase electrical calculations
• Transformer efficiency and voltage relations
• Voltage drop analysis for circuits
• Motor current and load calculations
• Power factor correction concepts
• Electrical unit conversions and engineering values

And many more features!

Ideal for:
• Electrical engineering students
• Industrial electricians
• Power system technicians
• Engineering instructors

Why Use This App:
• Fast and accurate engineering calculations
• Easy-to-use professional interface
• Helpful for study and field work
• Supports industrial electrical applications
• Useful for exam preparation and technical learning
• Convenient offline engineering reference

Calculators In This App:

Electrical (11): Ohm’s Law, Voltage Drop, Current, Voltage, Active Power, Apparent Power, Reactive Power, Power Factor, Resistance, Impedance, Wire Size.

Components (1): Resistor Color Code.

AC & Power Quality (8): RMS from Peak, Peak from RMS, Average Rectified Voltage, Crest Factor, Voltage Unbalance, Demand Factor, Diversity Factor, Load Factor.

Fault & Protection (14): Short Circuit Current, Fault Level (kA / MVA), Breaker Capacity Check, Arc Flash Energy, Relay Overcurrent Setting, Impedance from SC Test, X/R Ratio, Peak Fault Current, DC Offset in Fault Current, Thermal Withstand (I²t), CT Ratio Selection, Relay Plug Setting Multiplier, Earth Fault Loop Impedance, Symmetrical Components (Basic).

Transformers (10): Transformer Turns Ratio, Transformer Loading, Voltage Regulation, Efficiency (η), Per Unit Impedance from %Z, Short Circuit Current from %Z, Copper Loss, Core Loss, Temperature Rise, Tap Changer Voltage.

Power Systems (7): Three Phase Power, 3Φ Unbalanced Load, kVA to kW, kW to HP, Capacitor PF Correction, kVAr for Target PF, Per Unit System.

Motors & Drives (13): Motor Full Load Current, Motor Starting Current, Motor Starting Torque, Star-Delta Conversion, Synchronous Speed, Slip Calculation, Torque from Power, Frequency from RPM, Motor Power from Torque, Starting kVA, Locked Rotor Current, Motor Efficiency from Losses, Acceleration Time.

Cables & Conductors (10): Cable Ampacity, Cable Derating, Conductor Power Loss, Cable Charging Current, Busbar Current Rating, Skin Effect Depth, Voltage Drop (3Φ Exact), Fault Thermal Limit, Conductor Temperature Rise, Maximum Cable Length from Zs.

Battery & Generation (5): Battery Sizing (Ah), Battery Discharge Time, Inverter Sizing, UPS Runtime, Generator Sizing.

Circuit Analysis (7): RLC Resonant Frequency, Inductive Reactance, Capacitive Reactance, Harmonic Distortion (THD), Neutral Current (Harmonics), Rectifier DC Output, Ripple Voltage.

Earthing & Grounding (9): Earth Electrode Resistance, Touch Voltage, Step Voltage, Lightning Protection Risk, Soil Resistivity (Wenner), Ground Grid Resistance, Ground Potential Rise, Touch Voltage Allowable, Step Voltage Allowable.

Renewable & EV (3): Solar Panel Sizing, Charge Controller Sizing, EV Charger Load.

Power System Planning (5): Transformer kVA from Load List, Generator Fault Contribution, Voltage Regulation of Feeder, Reactive Power of Line, Power Angle Equation.

Harmonics & Power Electronics (4): 6-Pulse Rectifier Harmonics, Harmonic Current from THD, Inverter Output Line Voltage, Switching Loss Approximation.

Energy & Economics (4): Energy Consumption, Maximum Demand, CO₂ Emissions from Energy, Annual Energy Cost

Recent changes:
Added support for more languages and made minor interface improvements.