WEBSITE • EMAIL UPDATES
Electrical Theory
Connect electrical quantities and working principles with practical guides and calculators.
Guides & learning resources
PRACTICAL GUIDE
Free Electrical Calculators
Free electrical calculators for motor current, kVA to amps, electricity cost, voltage drop, power factor correction and Ohm’s law, with examples and result exports.
Read resourceELECTRICAL CALCULATOROhm’s Law Calculator: Voltage, Current, Resistance & Power
Use two known values to calculate voltage, current, resistance and power for an ideal DC or resistive circuit. Supports common voltage, current and resistance units.
Open calculatorELECTRICAL CALCULATORMotor Current Calculator: kW / HP to Amps
Calculate estimated single-phase or three-phase motor current from kW or HP, voltage, power factor and efficiency. Includes formulas and a worked example.
Open calculatorELECTRICAL CALCULATORKVA to Amps Calculator: Single & Three Phase
Convert kVA to amps or amps to kVA for single-phase and balanced three-phase supplies, with line-to-line or line-to-neutral voltage options.
Open calculatorELECTRICAL CALCULATORPower Factor Correction Calculator: Capacitor kVAR
Estimate theoretical capacitor-bank compensation in kvar from active power, present power factor and target power factor. Compare apparent and reactive power.
Open calculatorPRACTICAL GUIDESingle Phase Induction Motor Types, Working principle and Diagram .
Learn about single-phase induction motor, including types, diagram and working. Explore the diagrams and related electrical equipment guides.
Read resourcePRACTICAL GUIDE3 phase 4 wire electrical system Circuit Diagram and Applicatioins .
Learn about three-phase four-wire system, including distribution diagram and benefits. Explore the diagrams and related electrical equipment guides.
Read resource
