Electrical Power Calculator (P = V × I)
Calculate electrical power from voltage and current (P = V × I). Free online watts calculator with current and resistance.
Electrical Power Calculator (P = V × I)
Voltage UV
Current IA
Power
24W
Voltage
12V
Current
2A
Power
24W
Resistance
6Ω
More about: Electrical Power Calculator (P = V × I)
What it calculates
The “Electrical Power Calculator (P = V × I)” calculator computes Power in W from 2 parameters: voltage u (V), current i (A).
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Voltage U = 12 V, Current I = 2 A the result is 24 W (P = U · I).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.