Time Duration Calculator

The time duration calculator lets you find the interval between two times in hours, minutes, seconds, and decimal format.

Start Time:

End Time:

Duration Results:

Related Date Duration Calculator Birthday Calculator

About Time Duration Calculator

The time duration calculator is a free and accurate online tool to calculate the difference between two times. Mostly, it is used by payroll managers, employees, and supervisors to calculate how long they worked on a project or how long the task lasts. It can be used to compute the daily work hours. You can also create the full timecard reports using the timesheet calculator.

Simply enter the start time and end time in the input boxes and choose the appropriate AM or PM option. That's all. Our system will start calculating and give you the final result in hours, minutes, and seconds.

Moreover, you can calculate the days between two dates using the day calculator.

Time Duration Calculator

How Does the Calculator Work

  • It takes two input values from the users. That's the Start time and the End time. Most importantly, the input values should be in a 12-hour format such as "HH:MM:SS (AM/PM)".
  • After entering all the values, just press the "Calculate" button.
  • Our calculator will subtract the start time from the end time to get the difference between the two given times.
  • Finally, the tool breaks down the duration result into different time units and shows results in hours, minutes, and seconds. It also gives the decimal hours, total minutes, and total seconds.

How to Calculate the Duration Between Two Times?

It's a complex process because it depends on the hours and minutes of the two given times being compared.

Also, it needs to convert the hours into the 24-hour time format to calculate the duration. AM hours will remain the same for both 12-hour and 24-hour formats. But for PM hours, add 12 to the number of hours to get the 24-hour time. For example, 04:25 PM will be 16:25 in 24-hour format.

So, let's take some examples to understand how to determine the number of hours and minutes between two times. Also, we will take the start time and end time on the same day.

Example 1:

Find the duration between the following times:
Start time = 09:35 AM
End time = 01:45 PM

Solution:

Firstly, we will convert both times into a 24-hour format.

So, the Start time would be 09:35, and the End time would be 13:45.

Now subtract the start time hours from the end time hours.

13 - 9 = 4 hours.

Similarly, subtract the start time minutes from the end time minutes.

45 - 35 = 10 minutes.

Finally, we get the time duration result: 4 hours, 10 minutes.

Example 2:

Suppose, Start time = 03:45 PM and End time = 06:25 PM. Calculate the duration between the given times.

Solution:

Here, both time is in PM. So, let's convert it into 24-hour time.

After converting,

Start time = 15:45
End time = 18:25

Here, end time minutes are less than start time minutes. So, subtract 1 hour from the end time hours and add 60 minutes to the end time minutes.

18 - 1 = 17
25 + 60 = 85

So, End time = 17:85

Now subtract the start time hours from the end time hours.

17 - 15 = 2 hours.

Similarly, subtract the start time minutes from the end time minutes.

85 - 45 = 40 minutes.

Finally, the duration result: 2 hours, 40 minutes.

As you can see, the manual calculation is complex and time-taking. Therefore, it's better to use our time duration calculator to make this task easy, fast, and accurate.