Enter the duty into the calculator to determine the Voltage from PWM.

- All Electrical Calculators
- Duty Cycle Calculator
- Injector Duty Cycle Calculator
- Quarter Wave Transformer Calculator
- Duty Value Calculator

## Voltage from PWM Formula

The following formula is used to calculate the Voltage from PWM.

V = D / 256 * 5

Variables:

- Where V is the Voltage from PWM (volts)
- D is the duty

To calculate voltage from PWM, divide the duty (PWM) by 256, then multiply by 5.

## How to Calculate Voltage from PWM?

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

**Example Problem #1:**

- First, determine the duty. In this example, the duty is measured to be 200.
- Finally, calculate the Voltage from PWM using the formula above:

V = D / 256 * 5

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

V = 200 / 256 * 5 = 3.906 (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:

duty = 21

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

V =21 / 256 * 5 = .410 (volts)