Highfields Amateur Radio Club
Constructors Corner.

Calculator pages.
Power (Wattage) Calculator.
Source code supplied by: www.electronics2000.co.uk © Simon Carter.

These calculators perform calculations associated with power (wattage).

The bottom one calculates power dissipated in a resistor given the current flowing through it.
Just fill in the two boxes on the left and press 'Calculate' to find the unknown value.

Calculate Power from Voltage & Current (P = V * I):

Enter Voltage:
                   

Arrow Arrow Power =

Watts

Enter Current:
                   

Calculate Voltage from Power & Current (V = P / I):
Enter Power:
                  
Arrow Arrow   Voltage =

Volts

Enter Current:
                  

Calculate Current from Power & Voltage (I = P / V):
Enter Power:
                  
Arrow Arrow Current =

Amps

Enter Voltage:
                  

Calculate Power Dissipated in a Resistor (P = I2 * R):
Enter Current:
                  
Arrow Arrow Power =

Watts

Enter Resistance:
                  

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