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How to calculate number of days in a month or a year in Excel?

As we all know, there are leap years and common years where leap year has 366 days and common year has 365 days. To calculate the number of days in a month or a year based on a date, this article will help you.

Calculate number of days in a given month with formulas

Calculate number of days in a given year with formulas

Calculate the number of weekdays, weekends or specific weekday between two dates


arrow blue right bubble Calculate the number of weekdays, weekends or specific weekday between two dates

Calculate the number of weekdays, weekends or specific weekday between two dates:

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doc calculate days in month 04

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arrow blue right bubble Calculate number of days in a given month with formulas


If you have a list of date in a column, to calculate the days in a month, please apply the following formulas:

Enter this formula: =DAY(DATE(YEAR(A2),MONTH(A2)+1,1)-1) into a blank cell beside your date, and then drag the fill handle down to the cells that you want to calculate the days in the specific month, see screenshot:

doc calculate days in month 1

Notes:

1. Another formula also can help you to calculate the days in a month, please apply this formula: =DAY(EOMONTH(A2,0)).

2. In the above formulas, A2 is the date cell that you want to get the number of days in a month based on.


arrow blue right bubble Calculate number of days in a given year with formulas

To get the number of days in a year, please do as this:

Enter this formula: =DATE(YEAR(A2),12,31)-DATE(YEAR(A2),1,1)+1 into a blank cell beside your date cell, then drag the fill handle down to the cells that you want to calculate the days in the specific year, see screenshot:

doc calculate days in month 2

Note: If you just have year numbers in the column, this formula: =365+IF(MOD(A2,4),0,1) can help you to calculate the days in the given years as following screenshot shown:

doc calculate days in month 3


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