Voltage Divider Calculator

Calculate the output voltage of a resistive voltage divider circuit.

V_out = V_in × R₂ / (R₁ + R₂)

Input

Input Voltage (V_in) Volts (V)

Resistance R₁ Ohms (Ω) — typically the top resistor

Resistance R₂ Ohms (Ω) — typically the bottom resistor

Load Resistance (R_L) — Optional Leave empty for unloaded divider

Result

Output Voltage 6.00 V

Current through R1 0.60 mA

Power in R1 3.60 mW

Power in R2 3.60 mW

Total Power 7.20 mW

How It Works

A voltage divider splits the input voltage proportionally based on the ratio of R2 to the total resistance (R1 + R2). Adding a load resistor (RL) in parallel with R2 reduces the output voltage.