- Published 11 Nov 2024
- Last Modified 11 Nov 2024
- 3 min
Voltage Divider Calculator
Use our sophisticated voltage divider calculator to work out the output voltage of a resistor divider circuit for a given set of resistor values and source voltage in seconds
Voltage dividers are fundamental circuits that split an input voltage into a smaller output voltage based on certain resistor values. Calculating the correct output voltage is a crucial step for the performance of your electronic projects, whether you’re a hobbyist, student or professional.
To calculate the voltage output, input your values for input voltage, and the values for each resistor and click Calculate. The calculator will then display the output voltage.
How does it work?
The calculator uses the following voltage divider circuit formula:
Vout = Vin x (R2/R1+R2)
Where:
V****out = the voltage across resistor 2
V****in = the voltage applied across resistor 1 and 2
R****1 = the resistance of the first resistor
R****2 = the resistance of the second resistor
In a simple voltage divider circuit, two resistors (R1 and R2) are connected in a series, and the input voltage is applied across the combination of these two resistors. The value of voltage across resistor 2 is the output voltage.
The current flowing through a conductor between two points is directly proportional to the potential difference across the two points, according to Ohm's Law, which describes the relationship between voltage, current, and resistance.
A law points to a relationship between the electric current flowing between two points and the resistance of the current's path, which equates to the voltage difference. The equation V = IR, where V is the voltage differential, I is the current in amperes, and R is the resistance in ohms, represents the law mathematically. Higher resistance means less current flow at a given voltage.
