## DC Volts to watts calculation formula

P_{(W)} = I_{(A)} x V_{(V)}

The power **P** in watts (W) is equal to the phase current **I** in amps (A), multiplied by the voltage **V** in volts (V).

So,

*W = A x V**watt = amp x volt*

**For example:**

*Current (I) = 2,5A**Voltage (V) = 110V*

*Power (P) = 2,5A x 110V = 275W*

## AC single phase volts to watts calculation formula

P_{(W)} = PF × I_{(A)} × V_{(V)}

The power **P** in watts (W) is equal to the power factor **PF**, multiplied by the phase current **I** in amps (A), multiplied by the RMS voltage **V** in volts (V).

So,

*W = PF x A x V**watt = PF x amp x volt*

**For example:**

*Current (I) = 2,5A**Voltage (V) = 110V**PF = 0,7*

*Power (P) = 0,7 x 2,5A x 110V = 192,5W*

## AC three phase volts to watts calculation formula

P_{(W)} = √3 × PF × I_{(A)} × V_{L-L(V)}

The power **P** in watts (W) is equal to square root of 3, multiplied by the power factor **PF**, multiplied by the phase current **I** in amps (A), multiplied by the line to line RMS voltage **V**_{VL-L} in volts (V).

So,

*W = √3 × PF x A x V**watt = √3 × PF x amp x volt*

**For example:**

*Current (I) = 2,5A**Voltage (V) = 110V**PF = 0,7*

*Power (P) = √3 × 0,7 x 2,5A x 110V = 333,42W*