Gadgetronicx > Electronics engineering calculators > Voltage divider calculator

Voltage divider calculator

This tool is devised to calculate the output voltage from a voltage divider built using two resistors R1 and R2.


**R1, R2, Vout, Vin - Input / Output. Minimum three inputs are necessary to perform the calculation




Formula:

To determine output voltage

Vout = ( R2 x Vin ) / ( R1 + R2 )

To determine R2

R2 = ( Vout x R1 ) / ( Vin - Vout )

To determine R1

R1 = ( ( Vin - Vout ) R2 ) / Vout

To determine input voltage

Vin = ( Vout x (R1 + R2) ) / R2

 

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