How Many Amps Is 11,500 Watts at 240 V?
47.92 A
11,500 watts at 240 V draws 47.92 A: amps = watts ÷ volts. For a load that runs 3 hours or more, the National Electrical Code 80% rule calls for a circuit of 60 A or larger (80% rule).
11,500 watts in amps at different voltages
| Voltage | Current | Circuit (continuous load) |
|---|---|---|
| 120 V | 95.83 A | Over 100 A – ask an electrician |
| 208 V | 55.29 A | 70 A or larger (80% rule) |
| 240 V | 47.92 A | 60 A or larger (80% rule) |
Adjust the numbers
The calculator below is pre-filled with the numbers above. Change any value to match your project.
- In kilowatts
- 11.5 kW
- Circuit for a continuous load
- 60 A or larger (80% rule)
What you will need
As an Amazon Associate we earn from qualifying purchases.
How it is calculated
For single-phase power, amps = watts ÷ (volts × power factor), and watts = volts × amps × power factor. Resistive loads such as heaters and incandescent bulbs have a power factor of 1; motors are lower.
Circuits that carry a load for 3 hours or more should be loaded to no more than 80% of the breaker rating, a rule from the National Electrical Code. The calculator suggests the smallest standard breaker that meets it.
Open the full watts to amps calculator for other shapes, a worked example and FAQs.