This tutorial will demonstrate how to calculate years of service in Excel and Google Sheets.

Calculate Years Months Main

Calculate Years & Months of Service

Calculate Years

To calculate the number of years between dates use the DATEDIF Function with criteria “y”:



Calculate Months

You can calculate the number of excess months using the criteria “ym” with the DATEDIF Function:



Output Service

Now we can output the years of service in a text string:

=DATEDIF(B3,C3,"y")&" Years and "&DATEDIF(B3,C3,"ym")&" Months "

Rounding Service Months

Your service calculation might require rounding months. To round months, you can use the EOMONTH Function to return the last day of a month.

You can round to the previous month:


EOMONTH Previous Month

Or round to the end of the current month:


EOMONTH Currunt Month

By adding 1 to the last day of a month, you can calculate the first day of the next month:


EOMONTH First Day Next month

With month rounding, you can count partial months as full months, or not count partial months at all.

Calculate Years & Months of Service in Google Sheets

All of the above examples work exactly the same in Google Sheets as in Excel.

Calculate year and month Google-Sheet