Voltage Divider Calculator
Calculate the output voltage in a voltage divider circuit based on the input voltage, resistor values, and load. Ideal for designing and analyzing voltage divider circuits. Obtain accurate results for the output voltage using this convenient online tool.
What is Voltage Divider Calculator
A voltage divider calculator is a tool used to calculate the output voltage of a voltage divider circuit. A voltage divider is a simple circuit that divides an input voltage into smaller fractions based on the values of the resistors used.
The formula for calculating the output voltage (Vout) of a voltage divider is:
Vout = Vin * (R2 / (R1 + R2))
Where: Vin is the input voltage applied to the voltage divider. R1 and R2 are the resistance values of the two resistors in the divider circuit.
To use a voltage divider calculator, you generally need to input the values of Vin, R1, and R2. The calculator then computes the output voltage Vout based on the formula mentioned above.
For example, if you have an input voltage of 12 volts (Vin), and your voltage divider circuit has a resistor value of 4 kilohms (R1) and 6 kilohms (R2), the voltage divider calculator can determine the output voltage (Vout) as follows:
Vout = 12 * (6 / (4 + 6)) Vout = 12 * 0.6 Vout = 7.2 volts
In this example, the output voltage of the voltage divider circuit would be approximately 7.2 volts.
Voltage divider calculators are useful for designing or analyzing circuits where a specific output voltage needs to be obtained by dividing the input voltage using resistors in a certain ratio.
Voltage divider rule
For R1 and R2 in series and Vout is the voltage of R2:
Voltage Divider Calculator Example
| Vin (Input Voltage) | R1 (Resistance 1) | R2 (Resistance 2) | Vout (Output Voltage) |
|---|---|---|---|
| 12V | 1kΩ | 2kΩ | 4V |
| 5V | 2.2kΩ | 1kΩ | 1.667V |
| 9V | 10kΩ | 20kΩ | 6V |
| 24V | 4.7kΩ | 10kΩ | 11.05V |
| 15V | 5.6kΩ | 3.3kΩ | 8.182V |
To calculate the output voltage (Vout) in a voltage divider circuit, you can use the formula:
Vout = Vin * (R2 / (R1 + R2))
For example, if you have an input voltage (Vin) of 12V, resistance values of R1 = 1kΩ and R2 = 2kΩ, you would calculate the output voltage as follows:
Vout = 12V * (2kΩ / (1kΩ + 2kΩ)) Vout = 12V * (2kΩ / 3kΩ) Vout = 12V * (0.6667) Vout ≈ 4V
So, for the given resistance values and input voltage, the output voltage is approximately 4V.
This table provides examples of different voltage divider configurations, and you can use the formula to calculate the output voltage for various resistor values and input voltages.
