Resistors & Passive
Voltage Divider Calculator
Quickly design potential dividers for ADC input scaling, level shifting, and reference voltages.
Input Parameters
V
Ω
Ω
Calculation Results
Output Voltage (Vout) (V)
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Divider Ratio (Vout/Vin)
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Formula & Theory
V_{out} = V_{in} \times \frac{R_2}{R_1 + R_2}
Frequently Asked Questions
Q: What is the loading effect on a voltage divider?
Connecting a load resistor in parallel with R2 decreases equivalent resistance, dropping Vout. Ensure load impedance is at least 10x higher than R2.