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

 

 
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Provide any 2 numeric values and you'll get all 4 values.  Click the Ohm's Law button after you have made your entries:

VOLTS

AMPS

OHMS

WATTS



FORMULAS - EQUATIONS - LAWS  -  CALCULATIONS

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)

 

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)
AC SINGLE PHASE 1ø
AMPS=WATTS÷(1.732 x VOLTS x PF) I = P÷(1.732 x E x PF)
WATTS= 1.732 x VOLTS x AMPS x PF P = 1.732 x E x I x PF
VOLTS=WATTS÷AMPS E=P÷I
VOLT-AMPS=1.732 x VOLTS x AMPS VA=1.732 x E x I
HORSEPOWER=(1.732 x V x A x EFF x PF)÷746
POWERFACTOR=INPUT WATTS÷(1.732 x V x A)
EFFICIENCY=(746 x HP)÷(1.732 x V x A x PF)
AC THREE PHASE 3ø

AMPS=

 WATTS÷(VOLTS x PF) I=P÷(E x PF)A=W÷(V x PF)
WATTS=VOLTS x AMPS x PF P=E x I x PFW=V x A x PF
VOLTS=WATTS÷AMPS E=P÷IV=W÷A
VOLT-AMPS=VOLTS x AMPS VA=E x IVA=V x A
HORSEPOWER=(V x A x EFF x PF)÷746
POWERFACTOR=INPUT WATTS÷(V x A)
EFFICIENCY=(746 x HP)÷(V x A x PF)

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