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Power Calculators
Calculate power requirements for business office, or industrial equipment.

Volts Amps Resistance Watts Calculator
Enter any two of the following values and click the calculation button.
The missing values will be calculated. Enter only two values.

 
Voltage or volts E or V =  volts V
Amperage or current I = amperes, amps A 
 Resistivity or resistance R =  ohms Ω
Wattage or power P = watts W
 
For R take impedance Z  
 

Watts Volts Amps Calculator
Please enter two values, the third value will be calculated.
Electrical power P watts Magic triangle power
Voltage V volts
Amperage I amps
   
 
     
 
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