Electrical Calculators
22 interactive tools with transparent guidance and tested shared calculation logic.
Ohms Law Calculator
Calculate voltage from current and resistance.
ElectricalWatts to Amps Calculator
Convert electrical power in watts to current using voltage.
ElectricalAmps to Watts Calculator
Convert current and voltage to electrical power.
ElectricalVolts to Watts Calculator
Calculate power from voltage and current.
ElectricalWatts to Volts Calculator
Calculate voltage from power and current.
ElectricalkW to Amps Calculator
Convert kilowatts to amps for a simplified DC/resistive circuit.
ElectricalAmps to kW Calculator
Convert amps to kilowatts for a simplified DC/resistive circuit.
ElectricalkVA to Amps Calculator
Convert apparent power to current for single-phase AC.
ElectricalAmps to kVA Calculator
Convert current and voltage to single-phase apparent power.
ElectricalPower Factor Calculator
Calculate power factor from real and apparent power.
ElectricalElectricity Cost Calculator
Estimate electricity cost from power, usage time and energy price.
ElectricalEnergy Consumption Calculator
Calculate energy consumed by a device.
ElectricalWatts to kWh Calculator
Convert constant power over time into energy.
ElectricalkWh to Watts Calculator
Find average watts from energy and time.
ElectricalVoltage Divider Calculator
Calculate unloaded output voltage of a two-resistor divider.
ElectricalSeries Resistance Calculator
Add resistor values in series.
ElectricalParallel Resistance Calculator
Calculate equivalent resistance of parallel resistors.
ElectricalLED Resistor Calculator
Estimate a series resistor for an LED circuit.
ElectricalBattery Life Calculator
Estimate battery runtime from capacity and load current.
ElectricalmAh to Wh Calculator
Convert battery capacity in milliamp-hours to watt-hours using voltage.
ElectricalWh to mAh Calculator
Convert watt-hours to milliamp-hours using voltage.
ElectricalSolar Panel Output Calculator
Estimate daily solar energy production from array size, peak-sun hours and system efficiency.