Voltage Divider Calculator
Calculate output voltage, current, and resistor power in a resistive divider.
Result
Complete the fields to calculate.
Formula and method
Vout = Vin × R2 / (R1 + R2)
Important assumptions
This model assumes an unloaded output. A connected load sits in parallel with R2 and changes the voltage.
Frequently asked questions
Does the calculation run locally?
Yes. Values are processed in your browser and are not sent to a server.
Can I use it for a real installation?
Use it as an educational reference and verify components, tolerances, safety, and applicable code with technical documentation or a qualified person.
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