Professional electrical engineering tools for cable sizing, load calculations, transformer sizing, and system design per NEC/IEC standards.
Calculate cable size based on current and voltage drop
Calculate load current from power and voltage
Calculate residential electrical load per NEC
Size transformers based on connected load
Calculate voltage drop in electrical cables
Calculate fault current for equipment rating
Calculate lighting levels and fixture requirements
Size standby generators for buildings
Calculate capacitor bank for PF improvement
Design earthing systems per IEEE 80
Quick cable sizing calculator
Full kW power calculator for single-phase & three-phase systems
Convert kW to current (amps) for 1φ and 3φ systems
Quick cable size recommendation from kW, voltage, PF, and length
Convert kW to BTU/hr for HVAC heat load calculations
Convert kW to horsepower (HP) with selectable HP type & efficiency
Convert kW to kVA and kVAR using power factor (PF) with steps & analysis
Select standard breaker rating from amps or kW with optional IEC/NEC verification
Our electrical calculators help engineers design safe and efficient electrical systems following NEC and IEC standards.
Size cables based on ampacity and voltage drop requirements. Select proper conductor sizes for various installation methods and insulation types.
Calculate transformer sizing, short circuit currents, power factor correction, and earthing system resistance for electrical installations.