Enter the total change in work (J) and the time (seconds) into the calculator to determine the Power.

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## Power Formula

The following formula is used to calculate the Power.

P = dW / dT

- Where P is the Power (watts)
- dW is the total change in work (J)
- dT is the time (seconds)

To calculate power, divide the change in work by the change in time.

## How to Calculate Power?

The following two example problems outline how to calculate the Power.

**Example Problem #1:**

- First, determine the total change in work (J). In this example, the total change in work (J) is measured to be 400.
- Next, determine the time (seconds). For this problem, the time (seconds) is calculated to be 30.
- Finally, calculate the Power using the formula above:

P = dW / dT

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

P = 400 / 30 = 13.33 (watts)

**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:

total change in work (J) = 120

time (seconds) = 40

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

P = 120 / 40 = 30 (watts)