Free Online Tool
Voltage Divider Calculator
Calculate the output voltage of a basic two-resistor voltage divider and review the formula.
The result will appear here.
How to Use
- Enter Vin, R1, and R2.
- Click calculate.
- Review Vout and the formula.
Examples
- Vin 5V, R1 10kΩ, R2 10kΩ gives 2.5V
- Check divider output for a sensor input
Calculation and Conversion Notes
Voltage divider output is calculated as `Vout = Vin × R2 / (R1 + R2)`. R1 is the resistor on the input voltage side, and R2 is the resistor on the ground side.
FAQ
Does Voltage Divider Calculator save my input?
No. Your input is not stored on a server. Supported actions run in your browser.
Can I use it on mobile?
Yes. The pages are responsive and work on desktop and mobile browsers.
Can I rely on the result?
Use the result as a quick reference. Important work should be checked separately.