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Welcome to 21 volts to watts, our post about the 21 volt to watt conversion.
Here we show you how to convert twenty-one volts to watts using the formulas for DC as well as AC circuits.
If you have been wondering how many watts is 21 volts, or if you have been looking for 21v in watts, then you are definitively right here. 🙂
We not only explain you the conversion of 21 volts to watts, but also feature a voltage to watt calculator you will like.
How many Watts is 21 Volts
The answer to the question how many watts is 21 volts depends on the flow of electric charge, either one-directional in direct current (DC), or bidirectional in case of alternating current (AC).
In case of 21 volts in an AC circuit, the power factor PF and number of phases make a difference, in addition to the connection scheme of the wires in case of 3-phase AC.
See the 21 volts to watts formulas in the next section, and make sure to check out our converter which you can find after the voltage to wattage example calculations.
21 Volts to Watts Conversion
To convert 21 volts to watts, determine your electric current in amperes (A), then apply the formula below which corresponds to your circuit:
AC, 1 Phase: W = PF × [A] × [21 V]
AC, 3 Phase, Line to Line (L-L): W = √3 × PF × [A] × [21 V]
AC, 3 Phase, Line to Neutral (L-N): W = 3 × PF × [A] × [21 V]
To learn what the power factor, line to line and line to neutral voltage in the context of changing 21 volts to watts stand for, read our article volts to watts, located in the header menu.
For the example 21 volts to watts conversions below, we assume a power factor of 0.5 and an electric current of 1.5 amperes. Therefore, for 21v to watts we get:
- Direct current (DC): W = [1.5 A] × [21 V] = 31.5 watts
- Alternating current (AC), 1 Phase: W = 0.5 × [1.5 A] × [21 V] = 15.75 watts
- Alternating current (AC), 3 Phases, L-L: W = √3 × 0.5 × [1.5 A] × [21 V] = 27.28 W
- Alternating current (AC), 3 Phases, L-N: W = 3 × 0.5 × [1.5 A] × [21 V] = 47.25 watts
Remember, these values for 21 volts in watts are example calculations under the assumption PF = 0.5 and I = 1.5 A. For your power factor, amperage and circuit, use our calculator.
Enter 21 in the Volts field, then choose your circuit from the drop-down menu. If requested, insert the PF. Next, in the Amps field, enter your electric current, then hit Convert.
If you wish to start 21 volts to watts over, first hit Reset, then proceed as explained above.
Besides 21 volt to watt, similar voltage to power conversions on our site include:
In the next section of our 21 volt to watt post, you can find the FAQs in the context, the instructions for using our custom search form, as well as the summary of 21v to watts.
21v to Watts
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