Watts to Amps Calculator
Convert watts to amps for DC, AC single phase, and three phase circuits. Calculate electrical current from power and voltage with our free online calculator.
Step 1: Power & Voltage Input
Understanding Power and Voltage
Watts measure electrical power (rate of energy consumption). Voltage is electrical potential difference. Amps measure current flow. Use this calculator to convert between these electrical units.
Step 2: Calculation Options
About Power Factor
Power factor is only relevant for AC circuits. It represents the ratio of real power to apparent power. For DC circuits, power factor is always 1.0. Most AC systems have power factors between 0.8 and 0.95.
Current Calculation Results
Calculated Current
Common Appliance Current Comparison
| Appliance | Power (Watts) | Voltage | Current (Amps) | Circuit Type |
|---|
Calculation Details
Watts to Amps Formulas
DC: I = P ÷ V
AC Single Phase: I = P ÷ (V × PF)
AC Three Phase: I = P ÷ (√3 × V × PF)
Where I = Current (Amps), P = Power (Watts), V = Voltage (Volts), PF = Power Factor. For three phase circuits, multiply by √3 (approximately 1.732).
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