Watts to amps calculator
Convert real electrical power to current for DC, single-phase or balanced three-phase AC.
Formula
DC: I = P/V; AC: I = P/(V × PF); three-phase: I = P/(√3 × V × PF)
Real power: 1,200 W · Current (A) ≈ (1,200 W)÷(120)
How to use
- Choose the circuit type.
- Enter watts, voltage and AC power factor.
- Read current in amperes.
Examples
- 1200 W at 120 V DC gives 10 A.
Frequently asked questions
Does DC use the power factor?
No. Power factor applies only to the AC modes.
Which three-phase voltage is required?
RMS line-to-line voltage for a balanced load.
Is this a cable sizing tool?
No. It calculates load current only.
Sources
Updated: