Electrical Calculators
22 interactive tools with transparent guidance and tested shared calculation logic.
Ohms Law Calculator
Calculate voltage from current and resistance.
ไฟฟ้าWatts to Amps Calculator
Convert electrical power in watts to current using voltage.
ไฟฟ้าAmps to Watts Calculator
Convert current and voltage to electrical power.
ไฟฟ้าVolts to Watts Calculator
Calculate power from voltage and current.
ไฟฟ้าWatts to Volts Calculator
Calculate voltage from power and current.
ไฟฟ้าkW to Amps Calculator
Convert kilowatts to amps for a simplified DC/resistive circuit.
ไฟฟ้าAmps to kW Calculator
Convert amps to kilowatts for a simplified DC/resistive circuit.
ไฟฟ้าkVA to Amps Calculator
Convert apparent power to current for single-phase AC.
ไฟฟ้าAmps to kVA Calculator
Convert current and voltage to single-phase apparent power.
ไฟฟ้าPower Factor Calculator
Calculate power factor from real and apparent power.
ไฟฟ้าElectricity Cost Calculator
Estimate electricity cost from power, usage time and energy price.
ไฟฟ้าEnergy Consumption Calculator
Calculate energy consumed by a device.
ไฟฟ้าWatts to kWh Calculator
Convert constant power over time into energy.
ไฟฟ้าkWh to Watts Calculator
Find average watts from energy and time.
ไฟฟ้าVoltage Divider Calculator
Calculate unloaded output voltage of a two-resistor divider.
ไฟฟ้าSeries Resistance Calculator
Add resistor values in series.
ไฟฟ้าParallel Resistance Calculator
Calculate equivalent resistance of parallel resistors.
ไฟฟ้าLED Resistor Calculator
Estimate a series resistor for an LED circuit.
ไฟฟ้าBattery Life Calculator
Estimate battery runtime from capacity and load current.
ไฟฟ้าmAh to Wh Calculator
Convert battery capacity in milliamp-hours to watt-hours using voltage.
ไฟฟ้าWh to mAh Calculator
Convert watt-hours to milliamp-hours using voltage.
ไฟฟ้าSolar Panel Output Calculator
Estimate daily solar energy production from array size, peak-sun hours and system efficiency.