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Excel Formula: Calculate overlapping days between two date ranges

doc calculate overtime pay 4

In this tutorial, it provides a formula to calculate the overlapping days between two date ranges in Excel. For example, the first given date range is 1/1/2020-6/20/2020, and the project A is proceeded in the date range 8/16/2019-1/2/2020, there are 2 overlapping days between these two date ranges as above screenshot shown.

If you want to follow along with this tutorial, please download the example spreadsheet.
doc sample

Generic formula:



End1, start1: the end date and start date in the first date range.
End 2, start2: the end date and start date in the second date range.

Return value

The formula returns the overlapping days with a numeric value.

How this formula work

Here the projects are proceeded in different date ranges, we want to calculate the overlapping days between date range of each project and a given fixed date range in Range C2:C3.
doc calculate overlapping days 2

In cell H3, please use below formula:


Press Enter key then drag autofill handle below to calculate the overlapping days.
doc calculate overlapping days 3


MIN function is used to find the minimum value in many values. Here it finds out the earlier date between the two end dates.

MAX function is used to find the maximum value in values.

The inner MAX function finds out the later date between two start dates.

To include both start date and end date, we offset the result by adding 1.


The outer MAX function is used to display the negative value instead of zero.

Relative Formulas

Relative Functions

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Comments (2)
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This comment was minimized by the moderator on the site
Das ist super und der halbe Weg zu der L√∂sung meines Ziels: Start Date und End Date markieren bei mir einen geplanten Projekteinsatz, die Liste der abzugleichenden Daten sind Abwesenheiten in einer gesonderten Tabelle. Ich m√∂chte neben der geplanten Projekteinsatzzeitspanne die Summe der √ľberlappenden Tage, die sich aus den Abwesenheiten ergeben, also in dem Beispiel hier 133 sehen. Eine Idee wie das geht? Ich habe schon eine Formel, die mir alle Start- und Endzeiten der √úberlappenden Abwesenheiten anzeigt, dabei habe ich die Filterfunktion benutzt, aber bei den konkreten Summen komme ich bisher nicht an...

Keine Ahnung ob das jetzt mit dem Foto klappt, ich probiere mal 2 Varianten.

This comment was minimized by the moderator on the site
Er det muligt at lave samme formel blot under forudsætning at et år er på 360 dage (fx ved hjælp af funktionen "DAGE360")?
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