VA to Watts Calculator

Volt-amperes are the apparent power a supply carries, watts are the real power it delivers, and the power factor is the fraction between them. Enter a VA rating and a power factor for the watts, or run it the other way from watts back to VA, and either way you also get the reactive power in var and the phase angle in degrees. A third action turns a measured voltage and current, single or three phase, into both kinds of power. Add a voltage to any action and it returns the current, which follows the volt-amperes and not the watts.

Calculator Type

Apparent power and a power factor into real power.

Between 0.01 and 1, off the nameplate. A heater or an incandescent lamp is 1, a UPS is commonly 0.6 to 0.9, and a motor at part load can be lower.
Only needed if you want the current as well. For three phase, this is the line-to-line voltage.
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Real power and a power factor back into apparent power.

Between 0.01 and 1, off the nameplate. A heater or an incandescent lamp is 1, a UPS is commonly 0.6 to 0.9, and a motor at part load can be lower.
Only needed if you want the current as well. For three phase, this is the line-to-line voltage.
Widget

A measured supply into both kinds of power.

For three phase, the line-to-line voltage.
Between 0.01 and 1, off the nameplate. A heater or an incandescent lamp is 1, a UPS is commonly 0.6 to 0.9, and a motor at part load can be lower.
Widget
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