Enter the total energy and power into the calculator to determine the time in seconds. This calculator can also evaluate any of the variables given the others are known.

Joules To Seconds Formula

The following formula is used to calculate the time in seconds given the total energy in Joules and the power in watts.

T = E / P


  • T is the time in seconds (s)
  • E is the total energy in Joules (J)
  • P is the power in watts (W)

To calculate the time in seconds, divide the total energy in Joules by the power in watts. This is because a watt is defined as one Joule per second, so dividing the total energy by the power gives the total time.

What is a Joules To Seconds?

Joules and seconds are units of measurement for two different physical quantities – energy and time respectively. Therefore, a direct conversion from Joules to seconds is not possible as they measure different things. However, in certain physics equations, such as those involving power (which is energy divided by time), these units may interact. For example, if you know the power of a certain process in watts (which is Joules per second), and you know the total energy in Joules, you could calculate the time in seconds. But there isn’t a direct “Joules to seconds” conversion.

How to Calculate Joules To Seconds?

The following steps outline how to calculate the Joules To Seconds using the formula T = E / P.

  1. First, determine the total energy in Joules (E).
  2. Next, determine the power in watts (P).
  3. Next, gather the formula from above = T = E / P.
  4. Finally, calculate the time in seconds (T).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

total energy in Joules (E) = 500

power in watts (P) = 50