Calc Guru     
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Power Calculator

DC power calculator

Enter 2 values to get the other values then press the Calculate button:

Resistance: R =
Current: I =
Voltage: V =
Power: P =
       

AC power calculator

Enter 2 values to get the other values then press the Calculate button:

Impedance: Z = °  = 
Current: I = °    
Voltage: V = °    
Power: S = °  = 
           

Energy & power calculator

Enter 2 values to get the other value then press the Calculate button:

Energy:     J
Time period     s
Average power:     W