Enter the input voltage (volts), the resistance of resistor 1 (ohms), and the resistance of resistor 2 (ohms) into the calculator to determine the Output Voltage.

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## Output Voltage Formula

The following formula is used to calculate the Output Voltage.

**Vo = Vi * R2 / (R1+R2)**

- Where Vo is the Output Voltage (volts)
- Vi is the input voltage (volts)
- R1 is the resistance of resistor 1 (ohms)
- R2 is the resistance of resistor 2 (ohms)

## How to Calculate Output Voltage?

The following example problems outline how to calculate the Output Voltage.

**Example Problem #1**

- First, determine the input voltage (volts). In this example, the input voltage (volts) is determined to be 140 .
- Next, determine the resistance of resistor 1 (ohms). For this problem, the resistance of resistor 1 (ohms) is measured to be 50 .
- Next, determine the resistance of resistor 2 (ohms). In this case, the resistance of resistor 2 (ohms) is found to be 4.
- Finally, calculate the Output Voltage using the formula above:

Vo = Vi * R2 / (R1+R2)

Inserting the values from above into the equation gives:

Vo = 140 * 50 / (50+4) = 129.62 (volts)

**Example Problem #2**

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as follows:

input voltage (volts) = 301

resistance of resistor 1 (ohms) = 4

resistance of resistor 2 (ohms) = 34

Entering these given values into the calculator above yields:

Vo = 301 * 4 / (4+34) = 31.68** **(volts)