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Single & Three-Phase Power Calculator

Current, kW, kVA and kVAr for single-phase and three-phase loads

Supply

V

UK: 230 V single phase, 400 V between lines on three phase.

A
kW
kVA

1 for heaters and resistive loads; about 0.8–0.9 for motors.

Display

Current

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Real Power

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Apparent Power

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Reactive Power

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Phase Angle

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Supply

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Power Triangle

All measurements

MeasureValueHow it is worked out