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Excel/Adding elapsed time to date/time column


Hello Dave,

I have a quick question for you. Seems like it should be very simple and common problem, but I couldn't find the answer elsewhere.

My problem is that I have a dataset, where the elapsed time is in minutes. I also have a start time from which the elapsed time is calculated. I need to regroup this into a single column with the following format: 2010-08-26 11:08:57 (year-month-day hour-min.sec).

To add the minutes I use the TIME(hour;min:sec) function. However, once the minutes exceed 1440 (1 day) Excel resets the minutes and only adds the value above 1440. I understand you can specify [min] in the format to add over a 24h period but in this case I would simply like to take this into account in the date.

Do you have any suggestions?

Many thanks in advance.


I would suggest NOT using the time function - instead, as you have values in minutes simply use

=YourValue/60/24 (or =YourValue/1440)

this will convert the minutes to the decimal fraction that excel expects time to be in - to excel, the decimal fraction is the time, the integer part is the date - so adding two times together will increment the date.

Hope this is clear - question found in question pool indicating the original expert was unable or unwilling to answer the question.
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Aidan Heritage


I have provided first hand support since `95 for Microsoft Office majoring in Word and Excel - support for all versions from 2 onwards. I'm based in the UK, so please allow for time differences when asking me questions from other parts of the world! As AllExperts closes down, just google me to find my details - I will still be around answering questions!


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