Electrical Calculators
Motor sizing, wire gauge, voltage drop, and load calculations for electricians, engineers, and DIY builders. All calculations run instantly in your browser.
Motor FLA Calculator
Calculate motor full load amps for single-phase and three-phase motors. Enter HP, voltage, efficiency, and power factor for instant FLA results.
Electrical Load Calculator
Calculate total electrical load for residential or commercial panel sizing. Enter your loads and quantities to get connected and demand load estimates.
Inverter Cable Size Calculator
Find the right cable gauge for your battery-to-inverter connection. Enter inverter watts, voltage, and distance for safe wire sizing.
Kilowatt-Hour (kWh) Calculator
Calculate kilowatt-hours and energy cost for any appliance or device. Enter watts, hours of use, and your electricity rate for instant results.
Amps Draw Calculator
Calculate current draw in amps from watts and volts for any device. Supports single-phase and three-phase loads with power factor adjustment.
Fusing Transformer Calculator
Calculate primary and secondary fuse sizes for power transformers. Enter kVA, primary and secondary voltages, and NEC multipliers.
Locked Rotor Amps (LRA) Calculator
Calculate motor locked rotor amps (LRA) for starting current estimation. Enter FLA and multiplier based on NEMA code letter.
Wire Distance Calculator
Calculate voltage drop and recommended wire gauge for any distance. Enter amps, distance, voltage, and target drop percentage.