Voltage divider calculator

This tool is used to calculate the output voltage from a voltage divider built using two resistors R1 and R2. A minimum of three inputs are necessary to perform the calculation.

R1, R2, Vout, Vin – Input / Output

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