Use this free watt to voltage calculator to convert power to voltage based on current. Supports DC, AC single-phase, and three-phase systems with power factor.
Quick Intro: Convert Watts to Volts
To calculate voltage from watts, divide power (watts) by current (amps). For AC systems, voltage also depends on the power factor and system phase. This calculator handles DC, single-phase, and three-phase AC automatically, applying the correct formula and giving accurate voltage values in seconds.
Watt to Voltage Calculator Overview
TheWatt to Voltage Calculatoris a simple tool that helps you calculate voltage when you know the power (in watts) and the current (in amps). It supports all major electrical systems, includingDC,single-phase AC, andthree-phase ACwith optional power factor. Just enter the wattage and current values, and the calculator will instantly return the correct voltage.
Sample Data Table
| Power (Watts) | Current (Amps) | Type | Power Factor | Voltage (Volts) |
|---|
| 1000 W | 5 A | DC | — | 200 V |
| 2000 W | 10 A | Single-Phase | 0.8 | 250 V |
| 3000 W | 5.5 A | 3-Phase | 0.8 | 393.75 V |
What is the formula to convert watts to volts?
Volts = Watts ÷ Amps (for DC)
How do I calculate voltage in AC circuits?
For single-phase: Volts = Watts ÷ (Amps × Power Factor)
How do I calculate voltage in 3-phase circuits?
Use: Volts = Watts ÷ (√3 × Amps × Power Factor)
What is a typical power factor value?
Most systems use 0.8 as a general assumption.
Does this calculator work with DC?
Yes, it works for DC and both AC systems.
Can I use this to design solar systems?
Yes, it's ideal for panels, inverters, and load estimations.
What is the result unit?
The result is in volts (V).
Can I reverse this to get watts from voltage?
Yes. Use: Watts = Volts × Amps (× Power Factor if AC).
What if I don’t know the power factor?
Use 0.8 for general estimates or consult device specs.
Is this calculator mobile-friendly?
Yes! It’s responsive and optimized for all devices.
