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OHM’S LAW CALCULATOR

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VOLTS=Voltage, AMPS=Current, OHMS=Resistance, WATTS=Power

Give me any TWO numeric values and I'll give you all FOUR. Press the Ohm's Law button after you have made your entries:
VOLTSAMPSOHMSWATTS


FORMULAS, EQUATIONS & LAWS
 
Symbolic:

E =VOLTS ~or~ (V = VOLTS)
P =WATTS ~or~ (W = WATTS)
R = OHMS ~or~ (R = RESISTANCE)
I =AMPERES ~or~ (A = AMPERES)
HP = HORSEPOWER
PF = POWER FACTOR
kW = KILOWATTS
kWh = KILOWATT HOUR
VA = VOLT-AMPERES
kVA = KILOVOLT-AMPERES
C = CAPACITANCE
EFF = EFFICIENCY (expressed as a decimal)

 
DIRECT CURRENT
  
AMPS=WATTS÷VOLTS I = P ÷ E A = W ÷ V
WATTS=VOLTS x AMPS P = E x IW = V x A
VOLTS=WATTS ÷ AMPS E = P ÷ IV = W ÷ A
HORSEPOWER=(V x A x EFF)÷746
EFFICIENCY=(746 x HP)÷(V x A)

Updated 02/23/08:

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