Huebsters' Website: Electric power, calculations

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Ohm's law: E = R × I
and power law: P = E × I.
P = power, I = intensity,
E = electro motive force (EMF = voltage),
V = voltage, potential difference,
R = resistance.

Enter any TWO of the following values,
then press the calculate button.
The missing values will be calculated.

Enter two values.
voltage E or V =   volts V
current I =   amperes, amps A
resistance R =   ohms Ω
power P =   watts W
 
Formula wheel   All formulas:
power, voltage, current, resistance

V or E from "voltage" or "electro motive force"

ALTERNATING CURRENT (AC)

Vl = line voltage (volts), Vp = phase voltage (volts), Il = line current (amps), Ip = phase current (amps)
Z = impedance (ohms), P = power (watts) φ = power factor (angle), VAR = volt-amperes (reactive)

Current (single phase): I = P / (Vp·cos φ)
Current (3 phase): I = P / √3 (Vl·cosφ) or I = P / 3 (Vp·cos φ)
Power (single phase): P = (Vp·Ip·cos φ)
Power (3 phase): P = √3 (Vl·Il·cos φ) or P = 3 (Vp·Ip·cos φ)
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