What the tool does, how to run it, and what to expect from the result.
A voltage divider splits an input voltage between 2 series resistors. Vout, measured across R2, is Vin x R2 / (R1 + R2). This is the unloaded formula; connecting a load resistor in parallel with R2 pulls Vout down, so it matters most for high-impedance loads like an op-amp input.
A quick way to understand who this helps, what it solves, and where it connects next.
Hobbyists, students, and engineers sizing a resistive voltage divider.
Calculating the output voltage of a simple 2-resistor voltage divider.
Short answers for the questions people usually have before trying a utility like this.
Yes. It is completely free, with no sign-up and no usage limits.
No, this is the unloaded divider formula. A load in parallel with R2 effectively lowers R2's value and pulls Vout down; for a high-impedance load the effect is usually small.
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Enter the input voltage and 2 resistor values to get the output voltage across R2.
6.0000 VOutput voltage, Vout (measured across R2)
6.000 mACurrent through the divider
Vout = Vin x R2 / (R1 + R2). This is an unloaded (no load resistor) divider; adding a load in parallel with R2 pulls Vout down.