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How to calculate date/time overlap in days or hours in Excel?

Supposing there are some date ranges recorded in a sheet, and now you want to calculate how many days or hours of those date ranges overlap with a specific date range as below screenshot shown. Except to compare date ranges and calculate one by one, here in this article, I introduce a formula to quickly solve this task in Excel.
doc date overlap 1

Calculate date/time overlap with formula


arrow blue right bubble Calculate date/time overlap with formula


Select a blank cell that you want to place the calculated result, enter this formula =MAX(MIN($G$2,C2)-MAX($G$1,B2)+1,0), and drag auto fill handle down to fill this formula to other cells. See screenshot:
doc date overlap 2

This formula also can calculate the time overlap in hours.

Tip.If you want to quickly count weekdays/weekends/specific day between two dates, please try to use the Kutools for Excel’s Formular Helper as shown in the following screenshot. It’s full function without limitation in 60 days, please download and have a free trial now.

doc count day between dates


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