Electrical Calculators
Calculate inverter capacity, electricity cost, AC and DC current, power factor, voltage drop, and single- or three-phase power.
Inverter Size Calculator
Estimate continuous inverter rating and surge capability from connected loads, simultaneity, and design headroom.
CALCElectricity Cost Calculator
Calculate daily, monthly, and annual electricity consumption and operating cost for an appliance or home-energy system.
CALCAC Current Calculator
Estimate single-phase or three-phase AC current from real power, voltage, power factor, and efficiency.
CALCDC Current Calculator
Estimate DC current from power, voltage, and conversion efficiency.
CALCPower Factor Calculator
Calculate apparent power and power factor from real power, voltage, current, and phase configuration.
CALCCable Voltage Drop Calculator
Estimate conductor resistance, voltage drop, and percentage drop for copper or aluminum conductors using one-way length and load current.
CALCSingle-Phase Power Calculator
Calculate real power, apparent power, and estimated input energy for a single-phase AC load.
CALCThree-Phase Power Calculator
Calculate three-phase real power, apparent power, and estimated useful output from line voltage, line current, power factor, and efficiency.
Planning with electrical calculators
Use several related tools rather than relying on one result. Energy systems are constrained by both energy and power, and final equipment choices depend on climate, operating schedules, manufacturer limits, utility rules, and local codes.