How many amps is 1,800 watts at 240 volts?

7.5 amps. Doubling the voltage halves the current for the same power, which is why big loads (dryers, ranges, EV chargers) run on 240 V. A dedicated 240 V circuit for this load starts at a 15 A breaker.

What's the formula for converting watts to amps?

For DC and resistive AC loads: amps = watts ÷ volts. For AC loads with a power factor (motors, magnetic ballasts): amps = watts ÷ (volts × PF). A PF of 0.8 makes the same 1,800 W draw 25% more current.

Is 1,800 watts a lot?

For scale: a dishwasher, a deep fryer, an induction cooktop draw about 1,800 W. A standard 120 V household circuit tops out at 1,800 W (15 A) or 2,400 W (20 A).

1,800 Watts to Amps

1,800 watts is 15 amps at 120 volts and 7.5 amps at 240 volts (amps = watts ÷ volts, at unity power factor). Every common voltage below.

1,800 Watts to Amps conversion table

Voltage	Amps (PF 1.0)	Amps (PF 0.8)
12 V DC	150 A	–
24 V DC	75 A	–
48 V DC	37.5 A	–
120 V AC	15 A	18.8 A
208 V AC	8.65 A	10.8 A
240 V AC	7.5 A	9.38 A
277 V AC	6.5 A	8.12 A
480 V AC	3.75 A	4.69 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.

What draws about 1,800 watts?

Measure it instead of converting it

A load this size usually plugs into a 120 V outlet. A plug-in power meter between the outlet and the cord shows its real amps and watts with nothing opened up. A clamp meter reads one conductor at a time, so it is the tool for hardwired and 240 V circuits.

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Plug-in power meter