Converting unix time into date-time via excel

Question

Trying to convert 1504865618099.00 Unix time into a readable date time. I tried this:

=(UNIX + ("1/1/1970"-"1/1/1900"+1)*86400) / 86400

But it's not working.

Answer 1

• To convert the epoch(Unix-Time) to regular time like for the below timestamp

  Ex: 1517577336206

• First convert the value with the following function like below

  =LEFT(A1,10) & "." & RIGHT(A1,3)

• The output will be like below

  Ex: 1517577336.206

• Now Add the formula like below

  =(((B1/60)/60)/24)+DATE(1970,1,1)

• Now format the cell like below or required format(Custom format)

  m/d/yyyy h:mm:ss.000

Now example time comes like

2/2/2018 13:15:36.206

The three zeros are for milliseconds

Answer 2

=A1/(24*60*60) + DATE(1970;1;1) should work with seconds. Your time is in milliseconds, so dividing by 1000 gives use the correct date (like =(A1/86400/1000)+25569 Don't forget to set the type to Date on your output cell. I tried it with this date: 1504865618099 which is equal to 8-09-17 10:13.

Answer 3

in case the above does not work for you. for me this did not for some reasons;

the UNIX numbers i am working on are from the Mozilla place.sqlite dates.

to make it work : i splitted the UNIX cells into two cells : one of the first 10 numbers (the date) and the other 4 numbers left (the seconds i believe)

Then i used this formula, =(A1/86400)+25569 where A1 contains the cell with the first 10 number; and it worked