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How to calculate elapsed time/days/months/years between two datetimes in Excel?

Here you have two time lists, one list is the start time, the other is the end time, can you calculate the elapsed time between two times in the same row quickly as below screenshot shown? Here, this tutorial introduces the tricks on calculating elapsed time, days, months, or years between two datetimes in Excel.
doc calcualte elasped time 1

Calculate elapsed time/days/months/years with formula


Calculate age based on birthday

Here you have a list of birthday for instance, and have you ever tried to calculate the age today based on thses birthday? Kutools for Excel's Calculate age based on birthday can do you a nice favor. Note: The date of "Today" in below example is 1/10/2016
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arrow blue right bubble Calculate elapsed time/days/months/years with formula


Calculate elapsed time

1. Select a blank cell, enter this formula =IF(B2< A2, 1 + B2 - A2, B2- A2), A2 is start time, B2 is End time, and press Enter key then drag auto fill handle to fill formulas to the cells you want.
doc calcualte elasped time 2

2. Keep formula cells selected, right click to open context menu, and choose Format Cells, and in the Format Cells dialog, under Number tab, select Time from left pane, then to choose the time type you want to display in right section. See screenshot:
doc calcualte elasped time 3

3. Click OK. The elapsed times have been displayed.

Calculate elapsed days/month/years

To calculate elapsed days is so easy, you just need to apply this formula = B2-A2, A2 is the start date, B2 is the end date.
doc calcualte elasped time 4

Tip: To calculate elapsed month, you can use this formula =DATEDIF(A2,B2,"m"), A2 is the start date, B2 is the end date. For elapsed years, apply =DATEDIF(A2,B2,"m")/12, and then format the cells as number.

Calculate elapsed year, month and days

Kutools for Excel, with more than 120 handy Excel functions, enhance your working efficiency and save your working time.

For example, you have two dates, and you want to know the exact difference between these two dates, and display the elapsed period as x Years, x Month, x Days (such as 2 Years, 6 Months, 19 Days), you can apply below formula.

Select a blank cell which will place the calculated result, enter this formula =DATEDIF(A2,B2,"Y") & " Years, " & DATEDIF(A2,B2,"YM") & " Months, " & DATEDIF(A2,B2,"MD") & " Days", press Enter key to get the result.
doc calcualte elasped time 5


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To quickly add a specific number of days to a given date, Kutools for Excel's Add Years/Months/Days to Date utilities can give you a favor.
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    kriso · 2 years ago
    how would you find the average of such formulas