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.