This tool calculates the voltage drop across each resistor in a series network of two resistors.
- Input Voltage Vin
- R1 and R2 in milliOhm/Ohm/kiloOhm/megaOhm
The largest voltage drop will be across the larger resistor value. Conversely, the smallest voltage drop will be across the smaller.
If you want to calculate the voltage drop across a single resistor set R2=0 and from the equations above, V1=Vin and V2=0 (which makes sense).
With R1=1Ω, R2=3Ω, Vin=12V, the voltages
The sum of the two voltages = the input voltage. As a check you can see that 3+9= 12V
Voltage Divider Calculator with 3 resistors
Voltage Divider Calculator with 5 resistors