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OHM'S LAW CALCULATOR

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
                 



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


AC SINGLE PHASE ~ 1ø
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 PF
W=V x A x PF
VOLTS=
WATTS÷AMPS
E=P÷I
V=W÷A
VOLT-AMPS=
VOLTS x AMPS
VA=E x I
VA=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)
   


AC THREE PHASE ~ 3ø
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)
   

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who you can trust for lighting,
wiring, and everything in between.

Rule #1: If we don't take care of the customer, somebody else will.


Matthews Electric, Inc.
P.O. Box 605
Pembroke, MA 02359
781-293-3271
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Fully Insured: Liability, Workman's Comp, Auto

Commonwealth of Massachusetts
Division of Professional Licensure of Electricians
Masters License # A18021
Journeymans License # E39939

State of New Hampshire Bureau of Electrical
New Hampshire Lic.
Masters License # M11221


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