1,200 Watts to Amps — How Many Amps Is 1,200 Watts?
1,200 Watts equals 10.00 amps at 120V or 5.00 amps at 240V. Common 1200W devices: Standard microwave, window AC, electric skillet.
1,200 Watts Amps at Every Voltage
| Voltage | Single Phase | Three Phase |
|---|---|---|
| 120V | 10.00A | 5.77A |
| 208V | 5.77A | 3.33A |
| 240V | 5.00A | 2.89A |
| 277V | 4.33A | 2.50A |
| 480V | 2.50A | 1.44A |
The Formula
Single Phase: Amps = Watts ÷ Volts. For 1,200 Watts at 120V: 1200 ÷ 120 = 10.00A.
Three Phase: Amps = Watts ÷ (Volts × 1.732). For 1,200 Watts at 240V 3-phase: 1200 ÷ (240 × 1.732) = 2.89A.
With power factor: Amps = Watts ÷ (Volts × PF). A PF of 0.8 increases the current draw by 25%.
Wire and Breaker for 1,200 Watts at 120V
At 120V, 1,200 Watts draws 10.0A. Recommended: 14 AWG copper wire with a 15A breaker per NEC 310.16. For continuous loads (3+ hours), apply 125% rule. Use our Wire Size Calculator for exact sizing.
Common 1200W Devices
Standard microwave, window AC, electric skillet. Always check the device nameplate for exact wattage — rated watts may differ from actual consumption.
Disclaimer: Calculations are for reference. Verify with device nameplate. Consult a licensed electrician for installations.