Volts to Watts Calculator
Volts cannot be converted to watts without current. Enter voltage and amps to calculate electrical power, and include power factor when working with AC loads such as motors, transformers, and power supplies.
Volts to Watts Calculator
Enter the known electrical values. The result updates automatically.
Result updates automatically.
Formula: W = V x A
How to Use the Volts to Watts Calculator
Volts cannot be converted to watts without current. Enter voltage and amps to calculate electrical power, and include power factor when working with AC loads such as motors, transformers, and power supplies. Always use consistent RMS values for AC calculations and check equipment nameplates for exact rated values.
120 V and 10 A
1200 W
240 V and 20 A
4800 W
120 V, 10 A, PF 0.8
960 W
Electrical Formula Notes
This calculator uses the selected electrical formula and updates the result in real time. AC results depend on phase and power factor, while battery Wh to mAh results depend on voltage.
Volts to Watts Calculator FAQ
Can electrical units always be converted directly?
No. Many electrical calculations require another value. For example, watts, amps, and volts are related, but you need at least two known quantities to solve the third.
When should I use power factor?
Use power factor for AC real-power calculations involving watts or kW. Pure DC and purely resistive AC loads can usually use a power factor of 1.
Are these results suitable for final electrical design?
Use them for estimating and reference. Final wiring, breaker sizing, and code compliance should be checked against local electrical standards and manufacturer ratings.