# Calculating age in Excel

Hello,

Given a person's Date of Birth (DOB), what is the simplest formula in Excel that will accurately display that person's current age (in years)?  I emphasize "current" because I'm interested in a formula that will auto-update the result each day (i.e. the age will increase automatically on the person's birthday).

Thanks
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Microsoft MVP ExcelCommented:
Until Barryhoudini comes along and posts how to do it correctly, here's my stab

=(B1-A1)/365.25

where A1 is the DOB and B1 is the current date.

cheers, teylyn
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ConsultantCommented:
Probably more than you want but - assuming your DOB is in A1:

=INT((TODAY()-A1)/365.25) & " years, " & INT(((TODAY()-A1)/365.25-INT((TODAY()-A1)/365.25))*12) & " months, " & TEXT(((TODAY()-A1)/365.25-INT((TODAY()-A1)/365.25)-INT(((TODAY()-A1)/365.25-INT((TODAY()-A1)/365.25))*12)/12)*365.25,"0.0") & " days"

Kevin
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Commented:
Use this:
B3 is the column with the birthday

=DATEDIF(B3;TODAY();"Y")
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Author Commented:
Thanks
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