Electrical Engineering

Voltage Divider Calculator

Calculate output voltage, current draw, and power dissipation for a two-resistor voltage divider.

Input Voltage (Vin)

R1 (top resistor)

R2 (bottom resistor)

Enter Vin, R1, and R2 to calculate the output voltage and power.

Formula

Vout = Vin × R2 / (R1 + R2)

I = Vin / (R1 + R2)

P1 = I² × R1

P2 = I² × R2