Potential Divider Calculator
These calculators perform calculations for potential
divider circuits. The first one calculates the voltage from known resistor values, the
second finds suitable resistor values if the desired output voltage is known. The third
calculates R2 given V1, V2 and R1. Preferred resistor values are also calculated for the second and third calculators.
Use the radio buttons on each calculator to select the preferred value series to use.
Calculate Voltage Out (V2) from Resistors (R1 & R2):
Calculate Resistors (R1 & R2) from Voltage Out (V2):
Calculate Resistor R1 from Voltage Out (V2) and R2:
The voltage out of the divider is determined by the
resistor values using the equation:
V2 = (R2 / (R1 + R2))
For further details about the operation of a potential divider see the technical data section
If you found this calulator useful you should try Electronics Assistant!
- All the online calculators and more in a stand-alone application
- Converts Resistor & Inductor colour codes, calculates LED series resistors, capacitance
units, series / parallel resistors & capacitors, frequency, reactance & more
- Calculation of nearest preferred resistor values with a choice of 5 series from E12 to E192
- Print & save calculation results