Volts (V) to Watts (W) Converter

What Is a Volts (V)?

Volts (V) measure electrical voltage, the force that pushes current through a circuit. Voltage alone cannot determine watts. You also need current, resistance, impedance, or other circuit data.

What Is a Watts (W)?

Watts (W) measure electrical power, or how fast a circuit uses or delivers energy. In a basic DC circuit, watts equal volts multiplied by amps. The result shows the circuit's power output or use.

How to Convert Volts (V) to Watts (W) manually?

To convert volts to watts in a basic DC circuit, you need current in amps. Use $P = V \times I$, where $P$ means watts, $V$ means volts, and $I$ means amps.

Formula: $P = V \times I$

Step by step Guide

1. Enter the voltage in volts.
2. Enter the current in amps.
3. Multiply volts by amps.
4. Read the answer in watts.

Practical Example: A 12 V circuit carries 5 A. Calculate $12 \times 5 = 60$ W. The circuit produces 60 watts.

Convert Volts to Watts using Resistance

You can calculate watts from voltage and resistance when the load acts as a resistive circuit. Use $P = V^2 / R$, where $P$ is watts, $V$ is volts, and $R$ is resistance in ohms.

Formula: $P = V^2 / R$

Step by step Guide

1. Enter voltage in volts.
2. Enter resistance in ohms.
3. Square the voltage.
4. Divide by resistance.

Practical Example: A 120 V load has 24 Ω resistance. Calculate $120^2 / 24 = 600$ W. The load uses 600 watts.

AC three phase volts to watts calculation

For a balanced AC three phase system, watts depend on voltage, current, and power factor. Use RMS voltage for AC calculations. Choose line to line or line to neutral voltage based on the value you know.

Formula: Line to line uses $P = \sqrt{3} \times V_{LL} \times I \times PF$. Line to neutral uses $P = 3 \times V_{LN} \times I \times PF$.

Step by step Guide

1. Identify the voltage type.
2. Enter RMS voltage and current.
3. Enter the power factor.
4. Apply the correct formula.

Practical Example: A balanced 400 V system with 10 A and PF 0.8 gives about 5,543 W.

Calculation with line to line voltage

Formula: $P = \sqrt{3} \times V_{LL} \times I \times PF$

Step by step Guide

1. Enter line to line RMS voltage.
2. Enter phase current in amps.
3. Enter the power factor.
4. Calculate the real power in watts.

Practical Example: With 400 V, 10 A, and PF 0.8, calculate $1.732 \times 400 \times 10 \times 0.8 \approx 5,543$ W.

Calculation with line to neutral voltage

Formula: $P = 3 \times V_{LN} \times I \times PF$

Step by step Guide

1. Enter line to neutral RMS voltage.
2. Enter phase current in amps.
3. Enter the power factor.
4. Calculate the real power in watts.

Practical Example: With 230 V, 10 A, and PF 0.8, calculate $3 \times 230 \times 10 \times 0.8 = 5,520$ W.

Volts (V) to Watts (W) Conversion Chart

Note: These values use $P = V \times I$ for basic DC or resistive loads. AC loads may need power factor.