# How do you convert watts to volts

## How to convert volts to watts

Conversion of electrical voltage in volts (V) into electrical power in watts (W).

You can calculate watts from volts and amps, but you cannot convert volts to watts because watt and volt units do not measure the same amount.

### Calculation formula for direct voltage in watts

The performance *P* in watts is equal to the voltage *V.* in volts multiplied by the current *I.* in amps:

*P *_{(W)} = *V. *_{(V)} × *I. *_{(A)}

So watt is equal to volt times amperes:

Watt = volts × amps

or

W = V × A.

#### example

What is the power consumption in watts if the current is 3A and the power supply is 15V?

Answer: The power P corresponds to a current of 3 amps times the voltage of 15 volts.

*P* = 15 V × 3A = 45 W.

### Calculation formula for single-phase alternating voltage from volts to watts

The real power *P* in watts is equal to the power factor *PF* times the phase current *I.* in amps times the rms voltage *V.* in volts:

*P *_{(W)} = *PF* × *I. *_{(A)} × *V. *_{(V)}

So watt is equal to power factor times amps times volts:

Watt = *PF* × amp × volt

or

W = *PF* × A × V.

#### example

What is the power consumption in watts if the power factor is 0.8 and the phase current is 3A and the RMS voltage is 110V?

Answer: The power P corresponds to the power factor of 0.8 times the current of 3 amps times the voltage of 110 volts.

*P* = 0.8 × 3A × 110 V = 264 W.

### Calculation formula for three-phase alternating voltage from volts to watts

The real power *P* in watts is equal to the square root of 3 times the power factor *PF* times the phase current *I.* in amps, times the rms voltage *V. *_{L-L from} Line to line in volts:

*P *_{(W)} = *√ *3 × *PF* × *I. *_{(A)} × *V. *_{L-L (V)}

So watt is equal to the square root of 3 times the power factor PF times amps times volts:

Watt = *√ *3 × *PF* × amps × volts

or

W = *√ *3 × *PF* × A × V.

#### example

What is the power consumption in watts if the power factor is 0.8, the phase current is 3A and the RMS voltage is 110V?

Answer: The power P corresponds to the power factor of 0.8 times the current of 3 amps times the voltage of 110 volts.

*P *_{(W)} = *√ *3 × 0.8 × 3A × 110V = 457W

How to convert watts to volts ►

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