Wattage to Amp Converter

Convert power in watts to current in amps using voltage and power factor. Supports DC, single-phase AC, and three-phase AC systems.

Enter electrical values

Power (watts)

Voltage (volts)

System type

For most household loads, choose “DC / Single-phase AC”. Use “Three-phase” for 3-phase industrial systems.

Power factor (AC only, optional)

Leave blank to assume power factor of 1.0 (purely resistive load).

Enter watts and volts (and optionally power factor), then tap “Convert to Amps” to estimate current draw.

Formulas:
DC / Single-phase: I = P ÷ (V × PF)
Three-phase: I = P ÷ (√3 × V × PF)
This tool provides simplified estimates — always follow local electrical codes and consult a qualified electrician for real installations.

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