# Watts to volts calculator

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

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

Related

## What is Watts to volts calculator

Converting watts (W) to volts (V) requires additional information about the electrical circuit, specifically the current (I) flowing through it. The relationship between watts, volts, and amps is given by the formula:

Volts (V) = Watts (W) / Amps (A)

To calculate the voltage in volts, divide the power in watts by the current in amps.

For example, if you have a device with a power consumption of 500 watts (W) and a current of 10 amps (A), you can calculate the voltage as follows:

Volts (V) = 500 W / 10 A Volts (V) = 50 V

In this example, the voltage required for the device would be 50 volts.

It's important to note that this calculation assumes a direct conversion from watts to volts when considering resistive loads where the power factor is 1. However, for circuits with reactive components or loads with different power factors, additional considerations may be required to accurately determine the voltage in volts.

## DC watts to volts calculation

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

V(V) = P(W) / I(A)

## AC single phase watts to volts calculation

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

V(V) = P(W) / (PF × I(A) )

## AC three phase watts to volts calculation

### Calculation with line to line voltage

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

VL-L(V) = P(W) / (3 × PF × I(A) ) ≈ P(W) / (1.732 × PF × I(A) )

### Calculation with line to neutral voltage

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

VL-N(V) = P(W) / (3 × PF × I(A) )

## Watts to volts calculator Example

To convert watts (W) to volts (V), you need to know the current in amps (A). The formula for calculating volts from watts and amps is:

Volts (V) = Watts (W) / Amps (A)

Here's an example table that demonstrates how to calculate volts from different wattage values and corresponding current values:

Watts (W) Amps (A) Volts (V)
100W 2A 50V
200W 4A 50V
150W 3A 50V
75W 1.5A 50V

In this example, we assume a constant voltage of 50V. To calculate the volts, divide the given watts by the corresponding current. For example, if you have 100W of power and a current of 2A:

Volts (V) = 100W / 2A Volts (V) = 50V

Therefore, for 100W and 2A, the voltage is 50V.

Perform the same calculation for the other examples in the table using the given wattage and current values to obtain the voltage in volts.

Remember, this calculation assumes a constant voltage. If the voltage varies, other factors or more advanced calculations may need to be considered.