Highfields Amateur Radio Club
Constructors Corner.

Calculator pages.
Potential Divider Calculator.
Source code supplied by: www.electronics2000.co.uk © Simon Carter.

These calculators perform calculations for potential divider circuits.
The first one calculates the voltage from known resistor values.

The second finds suitable resistor values if the desired output voltage is known.

The third calculates R2 given V1, V2 and R1.

Potenital Divider Circuit Showing Notation Used in Calculators

Calculate Voltage Out (V2) from Resistors (R1 & R2):
Enter R1:  

Arrow

Arrow

 V2 =

Volts
Enter R2:  
Enter V1:  

Calculate Resistors (R1 & R2) from Voltage Out (V2):
Enter V1:  

Arrow

Arrow

 R1 =

R2 =

Ohms
Enter V2:  
Enter Total Resistance (R1 + R2):
                   

Calculate Resistor  R1  from Voltage Out (V2) and R2:
Enter V1:  

Arrow

Arrow

 R1 =

Ohms
Enter V2:  
Enter R2:  

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