Enter your Circuit Type (AC or DC), Voltage, Current, and — for AC circuits — a Power Factor, and the Volts to Watts Calculator will convert your electrical values into Power (Watts) and Power (Kilowatts).
Power
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Power (Kilowatts)
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DC power is calculated as P = V × I. AC power calculations require a power factor: single-phase AC uses P = V × I × PF, while three-phase AC uses P = √3 × V × I × PF.
Power factor (PF) is a measure of how effectively electrical power is used in AC circuits. It ranges from 0.1 to 1.0, with 1.0 being ideal. It's only needed for AC circuit calculations.
Yes, the calculator supports multiple units including millivolts (mV), volts (V), kilovolts (kV), milliamps (mA), amps (A), and kiloamps (kA). Units are automatically converted for accurate calculations.
Three-phase AC power uses the formula P = √3 × V × I × PF, where √3 ≈ 1.732. This accounts for the phase relationships in three-phase electrical systems.
Household circuits typically use 120V or 240V. Common currents range from 1A for small devices to 20A for large appliances. Always use the actual measured values for accurate calculations.
Yes, if you know the voltage and current output of solar panels, you can calculate their power output in watts. This is useful for sizing solar systems and understanding energy production.
Watts measure electrical power, volts measure electrical pressure (voltage), and amps measure electrical flow (current). Power equals voltage multiplied by current: P = V × I.
The calculations are mathematically precise based on electrical laws. However, real-world factors like temperature, component tolerances, and line losses may cause slight variations from calculated values.