# Tap Voltage Calculator

Author: Calculator Academy Team

Last Updated:

Enter the tap-up percentage (%) and the secondary voltage (volts) into the calculator to determine the Tap Voltage.

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## Tap Voltage Formula

The following formula is used to calculate the Tap Voltage.

Vt = Vs * T /100

Variables:

- Where Vt is the Tap Voltage (volts)
- T is the tap up percentage (%)
- Vs is the secondary voltage (volts)

To calculate the Tap voltage, multiply the tap up percentage by the secondary voltage.

## How to Calculate Tap Voltage?

The following two example problems outline how to calculate the Tap Voltage.

**Example Problem #1:**

- First, determine the tap up percentage (%). In this example, the tap up percentage (%) is measured to be 50.
- Next, determine the secondary voltage (volts). For this problem, the secondary voltage (volts) is calculated to be 4.
- Finally, calculate the Tap Voltage using the formula above:

Vt = Vs * T /100

Inserting the values from above and solving the equation with the imputed values gives:

Vt = 4* 50/100 = 2 (volts)

**Example Problem #2: **

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

tap up percentage (%) = 5

secondary voltage (volts) = 60

Entering these values into the formula or calculator above gives us::

Vt = 60 * 5 /100 = 3 (volts)