Calculate or simplify your voltage analysis tasks with this Voltage Drop Across Resistor Calculator Tool, providing instant, reliable results for every all possible resistor combination. Useful in assisting assignments works.

### VOLTAGE DROP ACROSS RESISTOR CALCULATOR

Enter the following values and press Calculate to find the voltage drop:

**Vin- Input Voltage** – This is the main Supply Voltage. **R1-R2** are the resistor in series with power source.

**Output Voltage** – This is the calculated Output Voltage across each resistor.

For manual calculation, You can use the below formulas applicable 2 resistors in series or just derive from ohms law V=IR

V1 = (R1 / (R1 + R2)) x V

V2 = (R2 / (R1 + R2)) x V

whereas, V is the Source voltage, R1 and R2 are the two resistors across which V1 and V2 are the voltages drop on each resistors respectively.

Also, for 3 resistor setup you can directly use below formula:

V1 = (R1 / (R1 + R2 + R3)) x V

V2 = (R2 / (R1 + R2 + R3)) x V

V3 = (R3 / (R1 + R2 + R3)) x V

whereas, R1, R2 and R3 are the resistors across which V1, V2 and V3 are the voltages drop on each resistors respectively.