Watts to Amps Calculator
Convert power to current for DC or AC circuits. Enter voltage, power and circuit type to get the current in amps.
How it works
- 1
Choose the circuit type
DC, single-phase AC or three-phase AC.
- 2
Enter voltage and power
In volts and watts.
- 3
Add power factor for AC
Typically 0.8-0.95 for most appliances.
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Frequently asked questions
Resistive loads like heaters use close to 1.0; motors and electronics often run 0.8-0.95 — check the equipment label if possible.
How watts convert to amps
For DC and simple calculations, amps = watts ÷ volts. For single-phase AC, amps = watts ÷ (volts × power factor). For three-phase AC, amps = watts ÷ (volts × power factor × √3).
Power factor accounts for the phase difference between voltage and current in AC circuits with motors or electronics; a value below 1 means more current is needed for the same real power.