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How to quickly convert milliseconds to a date in Excel?

Have you ever tried to calculate a date by a given number of milliseconds? For instance, 112233445566 is the number of milliseconds that far from a specific date, 1990, and now you want to convert the milliseconds to a date as below screenshot shown.
doc millisecond to date 1

Convert milliseconds to a date


Convert milliseconds to a date


With one formula, you can quickly handle this job.

Select a cell which you will place the date in, type this formula = (G2/86400000)+DATE(1990,1,1), G2 is the milliseconds cell, 1990,1,1 is the start date, press Enter key and drag autofill handle down to the cells for getting a list of decimal number. See screenshot:
doc millisecond to date 2

Go to Home tab and select Short Date from the Number Format drop-down list in Number group to format the numbers as dates. See screenshot:

doc millisecond to date 3 shot arrow right doc millisecond to date 4


Apply Date formatting (change date to multiple date formatting as you need)
doc apply date formatting

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