1 kW to Amps
1 kW is 4.17 amps at 240 V single-phase and 1.2 amps at 480 V three-phase (at unity power factor). Single- and three-phase tables below.
1 kW to Amps conversion table
| System | Amps (PF 1.0) | Amps (PF 0.8) |
|---|---|---|
| 120 V single-phase | 8.33 A | 10.4 A |
| 240 V single-phase | 4.17 A | 5.21 A |
| 208 V three-phase | 2.78 A | 3.47 A |
| 480 V three-phase | 1.2 A | 1.5 A |
PF = power factor. Resistive loads (heaters, incandescent lights) are PF 1.0; motors and compressors typically run PF 0.8-0.9. For a different value, use the interactive converter.
Frequently asked questions
4.17 amps single-phase (1 kW = 1,000 W ÷ 240 V). For a continuous 1 kW load — an EV charger, for instance — the circuit must be sized 25% above that.
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