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

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:

  1. First, determine the total change in work (J). In this example, the total change in work (J) is measured to be 400.
  2. Next, determine the time (seconds). For this problem, the time (seconds) is calculated to be 30.
  3. 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)