Use our free Watt Calculator to quickly determine the electrical power in watts (W) for any circuit or device. Simply input the voltage (V) and amperage (A) to get an instant result. Perfect for electricians, hobbyists, and anyone needing to understand electrical consumption and capacity.
Formula:
Ohm's Law for Power:
The fundamental formula for calculating electrical power (P) in watts is derived from Ohm's Law, combining voltage and current:
- P = V × I
Where:
- P = Power in Watts (W)
- V = Voltage in Volts (V)
- I = Current in Amperes (A)