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How to quickly add hours/minutes/second to date and time in Excel?

For instance, you have a list of dates and times in a worksheet, and now you want to add the same hours/minutes/seconds to these cells which are mixed with date and time. You can use formulas to solve this task, but here I can tell you another trick to quickly attain this goal in Excel.


Using formulas to add hours/minutes/seconds to datetime

In Excel, generally, you may use the formulas to add hours, minutes or seconds to the datetime cells.

1. Select the cell next to the first cell of the datetime list, and then type this formula =A2+1/24 into it, press Enter key and drag the auto fill handle over the cell needed this formula. See screenshots.

doc add hour minute second 2
doc add hour minute second 3

2. Then right click to select Format Cells from the context menu. And in the Format Cells dialog, under Number tab, select Custom from the Category list, then type m/d/yyyy hh:mm:ss into the Type textbox. See screenshots:

doc add hour minute second 4doc add hour minute second 5

3. Click OK. Then you can see each date and time cell is added one hour.
doc add hour minute second 6

Notes:

1. If you want to add one minute to cell, use this formula:=A2+1/1440, if you want to add one second to cell, use this formula: =A2+1/86400.

2. In above formulas, 1 indicates to add one hour or one minute or one second, you can change it as you need.

3. If you want to add hours, minutes and second to a date simultaneously, you can use this formula =A2+TIME(23,23,34), this means to add 23 hours, 23 minutes and 34 seconds to a date cell. But with this formula, you cannot add time over 24 hours.

Easily add days/years/month/hours/minutes/seconds to a datetime in Excel

Supposing you have a date time format data in a cell, and now you need to add a number of days, years, months, hours, minutes, or seconds to this date. Normally, using formula is the first method for all Excel users, but it’s hard to remember all formulas. With Kutools for Excel’s Date & Time Helper utility, you can easily add days, years, months, or hours, minutes or seconds to a date time, moreover, you can caculate the date difference, or the age based on a given birthday without remembering the formula at all. Click for full-featured free trial in 30 days!
doc add hour minute second
 
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Using a handy tool to add hours/minutes/seconds to datetime

With above method is very easy, but here I can introduce another easier way to you, do you want to have a try?

To free install Kutools for Excel, you can use the powerful utility -- Date & Time helper to add hours, minutes or seconds without remembering.

Kutools for Excel, with more than 300 handy functions, makes your jobs more easier. 

After installing Kutools for Excel, please do as below:(Free Download Kutools for Excel Now!)

1. Select a cell to put the adding result, and click Kutools > Formula Helper > Date & Time helper. See screenshot:
doc add time 1

2. In the Date & Time Helper dialog, check Add option, click doc select button 1 to select a cell that you use to add time,  then type the number of hours, minutes and seconds you want to add in the Enter number or select cells which contain values you want to add section, you can preview the adding result in Result section See screenshot:
doc add hour minute second 8

3. Click Ok, then drag the autofill handle over cells needed the formula, see screenshot:
doc add hour minute second 9
doc kutools date time helper 4



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Comments (16)
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This comment was minimized by the moderator on the site
86,400, as in seconds per day. Thus 1/86400, not 72000. Please correct
PaulR
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Thank u for ur kind remind, I have corrected it, thanks again.
Sunny
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this add in does not even work. I tried the exact example above and I just get errors.
Mehran
This comment was minimized by the moderator on the site
Thank u for ur remind.! I have corrected it. Thanks again.
Sunny
This comment was minimized by the moderator on the site
Could you give me a specific example?
Sunny
This comment was minimized by the moderator on the site
NICE IT WORKS THANK U
VIKAS
This comment was minimized by the moderator on the site
looks nice, but not working, what version of excel are you presenting?
your name
This comment was minimized by the moderator on the site
it works well, thanks...
anonymous
This comment was minimized by the moderator on the site
Thank you very much for this.
sreesha
This comment was minimized by the moderator on the site
This is really helpful. Thanks a lot! :-)
Pats
This comment was minimized by the moderator on the site
I know this is an old thread, but this doesn't work for me using KuTools. Does the original data have to be in a certain format? I've tried both general and custom (mm-dd-yyyy hh:mm:ss). Any help would be greatly appreciated!
Corey
This comment was minimized by the moderator on the site
How about subtracting 15 hours from a time? I have a worksheet with releases from river headgates and need to put in a formula to tell client what time to release water into river (15 hours prior to 8 AM).
Jerry
This comment was minimized by the moderator on the site
Hi, Jerry, to subtract 15 hours from a time, just use the formula time-15/24 to get the result.
Sunny
This comment was minimized by the moderator on the site
Pls help me how to02/03/202102:10Add time 24 hrsShow result03/03/202102:10
Sn mishra
This comment was minimized by the moderator on the site
Hi, Sn mishra, to add the fixed time 24 hours to a date, why you not directly add one day to the date? In this case, you can use the formula date+1 to get the result, such as ="2/3/2021 2:10"+1
Sunny
This comment was minimized by the moderator on the site
Hi,
I would like to have your help, please.
I have a register of miliseconds in a raw base data, but I need to have these miliseconds in a format of mm/ss, how can I change it? Is there any kind of formula?
Thank you in advance.
Jose
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