Excel offers a range of date and time functions to calculate the number of months between two dates, pivotal for project planning, financial forecasting, and tracking milestones. Understanding how to leverage these functions requires familiarity with Excel formulas and syntax.
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To find the total number of months between two dates, the DATEDIF
function is recommended. With the syntax =DATEDIF(start_date, end_date, "m")
, Excel counts the months between the dates, excluding the start date. For overdue calculations, the formula =DATEDIF(A2, TODAY(), "m") - 1
provides the past due month count. To include status, use =IF(EDATE(A2, 1) > TODAY(), "on track", DATEDIF(A2, TODAY(), "m") - 1)
for future date tracking.
The YEARFRAC
function serves as an alternative, outputting decimal months between two dates with =YEARFRAC(start_date, end_date)
. The result may need rounding or multiplying by 12 to convert it to a whole month count if required.
For cases where the precise number of months is needed, even if only days apart, combine YEAR
and MONTH
functions with the formula =(YEAR(end_date) - YEAR(start_date)) * 12 + (MONTH(end_date) - MONTH(start_date))
. This provides an exact month difference, factoring in partial months.
While the DATEDIF
function is currently available, Microsoft warns it might not be supported in future Excel versions, urging users to consider other methods for longevity.
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Use the DATEDIF function with the 'm' parameter. First, enter your start date and end date in separate cells, then use DATEDIF with the 'm' unit to calculate the full months between the dates.
The 'M' unit calculates the total number of complete months between dates, while the 'YM' unit calculates only the difference between months, ignoring the days and years of the dates.
While DATEDIF is the primary function for calculating months between dates, it may calculate incorrect results under certain scenarios, so results should be verified when using this function.
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