Electrical Power Calculator from Voltage and Current
Calculate electrical power in watts and kilowatts from the supply voltage and the current drawn. Enter voltage and current to see power and in…
8 of 8 free uses remaining today
Calculate electrical power in watts and kilowatts from the supply voltage and the current drawn. Enter voltage and current to see power and in kilowatts when you calculate.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (voltage = 230 V, current = 10 A), the results are: power 2,300.0 W; in kilowatts 2.300 kW.
Quick reference: voltage vs result
Reference table based on the example values; it is not your calculation result.
| Voltage (V) | Power | In kilowatts |
|---|---|---|
| 115 | 1,150.0 W | 1.150 kW |
| 230 | 2,300.0 W | 2.300 kW |
| 460 | 4,600.0 W | 4.600 kW |
| 1,150 | 11,500.0 W | 11.500 kW |
| 2,300 | 23,000.0 W | 23.000 kW |
| 4,600 | 46,000.0 W | 46.000 kW |
Frequently asked questions
What formula does this calculator use?
Power = v × i; In kilowatts = v × i ÷ 1000. Variables: v = voltage in V, i = current in A.
What do I need to enter?
You need voltage (V), current (A). Results update as you type.
What is an example result?
With the default inputs (voltage = 230 V, current = 10 A), the results are: power 2,300.0 W; in kilowatts 2.300 kW.
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