Elapsed Time Calculator: Calculate Time

An Elapsed Time Calculator is a free online tool that can be used to work out how much time has passed between two dates or times. This can be useful for working out how many hours you’ve worked, how long something has taken place for, how long it took you to travel somewhere or how long an activity has taken.

What is Elapsed Time?

Elapsed time is the amount of time between a start time and end time. It can be displayed in seconds, minutes, hours, days, weeks and months.
For example, if you start working at 9am and finish at 5.30pm, your elapsed time would be 8 hours and 30 minutes. If an event has started on a Monday and finished on a Wednesday, you can work out how many days and hours have passed.

By using our Elapsed Time Calculator, you can simply enter your start time and end time to see how much time has passed. This is useful for students, employees, business owners, freelancers, project managers and more.
This means you’ll no longer need to work out how much time has passed by hand.

How to Use the Elapsed Time Calculator

Our Elapsed Time Calculator is easy to use. Simply follow the steps below.

Enter the Start Date

Enter the date you started your activity/event/task.

Enter the Start Time

Enter your start time e.g 9am.

Enter the End Date

Enter the date your activity/event finished.

Enter the End Time

Enter your end time e.g 5.30pm.

Select Any Options

Select any options available, such as 12-hour or 24-hour.

Click Calculate

Click the calculate button to work out how much time has passed.

View the Result

The calculator will show how much time has passed between your start time and end time.

For example, if you started at 8am and finished at 2.45pm on the same day, the calculator will show you that 6 hours and 45 minutes have passed.

Ensure you select the correct end date if your activity has gone past midnight.

Elapsed Time Formula

To work out your elapsed time you need to subtract your start time from your end time.

Formula:

Elapsed Time = End Time - Start Time

Before you begin, ensure you convert your dates and times to the same unit of measurement (seconds/mins).

Elapsed Time in Minutes

Elapsed Minutes = End Minutes - Start Minutes

Elapsed Time in Hours

Elapsed Hours = Total Minutes / 60

Elapsed Time in Seconds

Elapsed Seconds = Total Minutes x 60

If you’re working out elapsed time between different dates, you’ll need to use the full date and time.

For example, from 10pm Monday to 6am Tuesday = 8 hours (not a negative number).

Example

Let’s look at an example of how to work out your elapsed time.

Example 1: Elapsed Time on the Same Day

An employee starts their shift at 9.15am and finishes at 5.45pm.

Start Time = 9.15am

End Time = 5.45pm

Convert both times to minutes.

Start Time:

(9 x 60) + 15 = 555

End Time:

(17 x 60) + 45 = 1065

Subtract the start time from the end time.

1065 - 555 = 510 mins

Convert to hours.

510 / 60 = 8.5 hours

Answer:

Elapsed Time = 8 hours 30 mins

Example 2: Elapsed Time Past Midnight

You begin an activity at 10.30pm and finish at 6.15am.

Start Time = 10.30pm

End Time = 6.15am (next day)

From 10.30pm to midnight = 1 hour 30 mins.

From midnight to 6.15 = AM = 6 hours and 15 mins.

Add the times together.

1:30 + 6:15 = 7:45

Answer = 7 hours 45 mins.

This shows how important it is to choose the correct date.

What Will My Result Show Me?

Once you enter your start and end times, the calculator will show you how much time has passed.

Depending on what options are available, you may receive a result in different units of time.

• Seconds – This is the smallest unit of time usually shown.
  Minutes – Useful for working out short activities, meetings etc.
• Hours and Mins – This is commonly used for working out how many hours you’ve worked, appointments etc.
• Days and Hours – Useful for working out how long events, projects and trips have taken.
• Total Hours – This will show you the full amount of time in decimal numbers. For example, 8.5 hours.

You can also convert 2 hours and 30 mins to 150 mins or 2.5 hours.

Note: Elapsed time is the actual difference between two times. It won’t automatically take account of your lunch break, holidays, weekends or non-working hours.

What Affects the Result?

There are a few things that can affect your result.

Start and End Times

The difference between your start and end times will affect how much time has passed. If you enter incorrect times you may get an incorrect result.

Date

If your activity has taken place over several days, you need to ensure you’ve selected the correct date.

AM/PM

The 12-hour clock uses AM and PM to show whether it’s morning or afternoon/evening. If you select the wrong one it can greatly affect your result.

Time Zones

If you’re calculating time between different locations. You’ll need to take the UTC offset into consideration. This means there may be a difference between New York and Los Angeles, compared to what the clock shows.

Daylight Saving Time

Some states and regions in the US use Daylight Saving Time. This means when the clock goes forward/backwards, the elapsed time may be different.

Lunch Breaks

If you’re working out how much time you’ve worked you may need to take lunch breaks and other unpaid breaks away.

Benefits and Uses of an Elapsed Time Calculator

There are many benefits to using an Elapsed Time Calculator. It can be useful for personal, education and professional use.

Saves Time

You can quickly work out the difference between two times in seconds.

Track How Much You’ve Worked

Employees, freelancers and business owners can work out how much time they’ve spent working on assignments, shifts and daily activities.

Helps with Project Management

Project managers can work out how long tasks have taken, track how long projects have taken and work out how long activities will take.

Calculates How Long You’ve Travelled

Travelers can work out how long they’ve travelled between two times. Ensure you’ve chosen the correct dates and time zones.

Useful for Students

Students can work out how long exams, studying, classes and assignments have taken.

Helps Plan Events

Event planners can work out how long meetings, conferences, presentations and planned activities have taken.

Improves Time Management

Knowing how long activities have taken can help with planning your schedule, deadlines and daily life.

Reduces Mistakes

As the calculation is done online, you won’t make common mistakes.

Accuracy, Assumptions and Limitations

If you enter the correct start and end dates and times you can get an accurate result. However, there are some assumptions and limitations.

• Assumes Correct Times – Assumes the start and end times are accurate.
• Correct Dates – If you’re calculating time that has gone past midnight or over several days, ensure you’ve chosen the correct dates.
• AM/PM or 24-Hour – Ensure you’ve chosen the correct AM/PM or 24-hour setting.
• Time Zones – If you’re calculating time between different locations, you may need to convert the time zones.
• Daylight Saving Time – The clock may change due to daylight saving time. If accuracy is important, use a time zone aware date/time.
• No Breaks – Standard elapsed time will include all the time between your start and end time. Unless you take breaks away.
• Months/Years – If you’re calculating months or years, you may need to take special considerations as months vary in length.
• Always double-check your values have been entered correctly. If you’re calculating for payroll or billing, ensure you know the policies in place at your workplace. Don’t assume that the elapsed time will automatically equal how much you’ll be paid.

FAQs

What is an Elapsed Time Calculator?

An Elapsed Time Calculator is a free online tool that can calculate the total time between two specific times/dates. This will show you the difference in seconds, minutes, hours and days. No manual calculations needed.

How Do I Calculate Elapsed Time?

You can calculate elapsed time by subtracting your start time from your end time. If you’re calculating longer times, convert both date/time values into the same unit, such as seconds.

Can I Calculate Elapsed Time Past Midnight?

Yes! Just ensure you’ve chosen the correct start and end dates. For example, from 10pm to 6am next day = 8 hours.

Does an Elapsed Time Calculator Take Away Lunch Breaks?

Not automatically. The elapsed time will show how much time has passed between your start time and end time. You’ll need to take away your lunch break or other unpaid breaks. Unless the calculator has a break option.

What is the Difference Between Elapsed Time and Time Duration?

They usually mean the same thing. Elapsed time commonly refers to how much time has passed since an event/activity began.