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# » Calculating Number of Days, Weeks, Months and Years between Dates

Problem:

Calculating the difference between each pair of dates listed in columns
A & B.

Solution:

To calculate the difference in days, use the DATEDIF function as shown in the following formula:
=DATEDIF(A2,B2,"d")

To calculate the difference in weeks, use the INT function as shown in the following formula:
=INT((B2-A2)/7)

To calculate the difference in months, use the DATEDIF function as shown in the following formula:
=DATEDIF(A2,B2,"m")

To calculate the difference in years, use one of the following two solutions:
Use the DATEDIF function as shown in the following formula:
=DATEDIF(A2,B2,"y")

OR

Use the YEAR, MONTH, AND, and DAY functions as shown in the following formula:

=YEAR(B2)-YEAR(A2)-(MONTH(B2) To calculate the number of months over years, use the DATEDIF function as shown in the following formula:
=DATEDIF(A2,B2,"ym")

To calculate the number of days over years, use the DATEDIF function as shown in the following formula:
=DATEDIF(A2,B2,"yd")

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