Enter the number of turns in secondary, the number of turns in primary, and the voltage in primary (volts) into the calculator to determine the Step Down Voltage.

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## Step Down Voltage Formula

The following formula is used to calculate the Step Down Voltage.

**SDV = Ns/Np * Vp**

- Where SDV is the Step Down Voltage (volts)
- Ns is the number of turns in secondary
- Np is the number of turns in primary
- Vp is the voltage in primary (volts)

## How to Calculate Step Down Voltage?

The following example problems outline how to calculate Step Down Voltage.

**Example Problem #1**

- First, determine the number of turns in secondary. In this example, the number of turns in secondary is determined to be 34 .
- Next, determine the number of turns in primary. For this problem, the number of turns in primary is measured to be 14 .
- Next, determine the voltage in primary (volts). In this case, the voltage in primary (volts) is found to be 23.
- Finally, calculate the Step Down Voltage using the formula above:

SDV = Ns/Np * Vp

Inserting the values from above and solving the equation yields:

SDV = 34/14 * 23 = 55.85 (volts)

**Example Problem #2**

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

number of turns in secondary = 3

number of turns in primary = 6

voltage in primary (volts) = 200

Enter these given values into the calculator or above yields:

SDV = 3/6 * 200= 100** **(volts)