Enter the stepper motor current (amps) and the phase resistance (ohms) into the calculator to determine the Stepper Motor Voltage.

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## Stepper Motor Voltage Formula

The following formula is used to calculate the Stepper Motor Voltage.

**Vsm = Ism * PR**

Variables:

- Where Vsm is the Stepper Motor Voltage (volts)
- Ism is the stepper motor current (amps)
- PR is the phase resistance (ohms)

## How to Calculate Stepper Motor Voltage?

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

**Example Problem #1:**

- First, determine the stepper motor current (amps). In this example, the stepper motor current (amps) is measured to be 16.
- Next, determine the phase resistance (ohms). For this problem, the phase resistance (ohms) is calculated to be 8.
- Finally, calculate the Stepper Motor Voltage using the formula above:

Vsm = Ism * PR

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

Vsm = 16 * 8 = 128 (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:

stepper motor current (amps) = 71

phase resistance (ohms) = 81

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

Vsm = 71 * 81 = 5751 (volts)