3,000 Watts to Amps — How Many Amps Is 3,000 Watts?
3,000 Watts equals 25.00 amps at 120V or 12.50 amps at 240V. Common 3000W devices: Small water heater, central AC fan.
3,000 Watts Amps at Every Voltage
| Voltage | Single Phase | Three Phase |
|---|---|---|
| 120V | 25.00A | 14.43A |
| 208V | 14.42A | 8.33A |
| 240V | 12.50A | 7.22A |
| 277V | 10.83A | 6.25A |
| 480V | 6.25A | 3.61A |
The Formula
Single Phase: Amps = Watts ÷ Volts. For 3,000 Watts at 120V: 3000 ÷ 120 = 25.00A.
Three Phase: Amps = Watts ÷ (Volts × 1.732). For 3,000 Watts at 240V 3-phase: 3000 ÷ (240 × 1.732) = 7.22A.
With power factor: Amps = Watts ÷ (Volts × PF). A PF of 0.8 increases the current draw by 25%.
Wire and Breaker for 3,000 Watts at 120V
At 120V, 3,000 Watts draws 25.0A. Recommended: 10 AWG copper wire with a 30A breaker per NEC 310.16. For continuous loads (3+ hours), apply 125% rule. Use our Wire Size Calculator for exact sizing.
Common 3000W Devices
Small water heater, central AC fan. 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.