// multi-utility computation suite · offline · instant · precise
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eng.electrical-power Calculator
Calculates active power (W), reactive power (VAR), apparent power (VA), and power factor from voltage, current, and phase angle in AC circuits. Power factor below 0.9 incurs utility penalties in industrial settings — power factor correction capacitors add leading reactive power to cancel inductive loads.
Inputs
V
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
I
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Pf
A multiplier applied in the calculation.
Results
active power P
Reference formula or conversion factor shown for context.
reactive power Q
Reference formula or conversion factor shown for context.