Volts to Watts Calculator

Convert voltage in volts (V) to power in watts (W). Ideal for understanding the power consumption or generation in electrical systems. Obtain an estimation of watts from volts using this convenient online tool.

 Select current type: DC AC - Single phase AC - Three phase Enter voltage in volts: V Enter current in amps: A Power result in watts: W

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What is Volts to Watts Calculator

To convert volts (V) to watts (W), you need to know the current (I) flowing through the circuit. The formula for converting volts to watts is:

Watts (W) = Volts (V) x Current (I)

Simply multiply the voltage by the current to obtain the power in watts.

For example, if you have a circuit with a voltage of 120 volts (V) and a current of 5 amps (A), you can calculate the power in watts as follows:

Watts (W) = 120 V x 5 A Watts (W) = 600 W

In this example, the power consumption in the circuit would be 600 watts.

It's important to note that this calculation assumes a purely resistive load where the voltage and current are in phase. If the load is not purely resistive or if there is a power factor involved, additional calculations may be required to accurately determine the power in watts.

DC volts to watts calculation formula

The power P in watts (W) is equal to the voltage V in volts (V), times the current I in amps (A):

P(W) = V(V) × I(A)

AC single phase volts to watts calculation formula

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

P(W) = PF × I(A) × V(V)

AC three phase volts to watts calculation formula

Calculation with line to line voltage

The power P in watts (W) is equal to square root of 3 times the power factor PF times the phase current I in amps (A), times the line to line RMS voltage VL-L in volts (V):

P(W) = 3 × PF × I(A) × VL-L(V)

≈ 1.732 × PF × I(A) × VL-L(V)

Calculation with line to neutral voltage

The power P in watts (W) is equal to 3 times the power factor PF times the phase current I in amps (A), times the line to neutral RMS voltage VL-N in volts (V):

P(W) = 3 × PF × I(A) × VL-N(V)

Volts to Watts Calculator Example

Voltage (V) Resistance (R) Current (I) Power (W)
12V 3A 36W
24V 3A 72W
9V 3A 27W
6V 3A 18W
15V 3A 45W

To calculate the power (P) in a circuit, you can use the formula:

P = V * I

Where:

• P is the power in watts (W)
• V is the voltage in volts (V)
• I is the current in amperes (A)

For example, if you have a voltage of 12V and a current of 3A, you would calculate the power as follows:

P = 12V * 3A P = 36W

So, for the given voltage and current, the power is 36W.

This table provides examples of different voltage, current, and power combinations. You can use the formula mentioned above to calculate the power for other voltage and current values using the table as a reference.