Skip to main content

Kutools for Office — One Suite. Five Tools. Get More Done.

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

Author Sun Last modified

Suppose you have some date ranges recorded in a sheet, and now you want to calculate how many days or hours of those ranges overlap with a specific date range, as shown in the screenshot below. Instead of comparing date ranges and calculating overlaps one by one, this article introduces a formula to quickly solve this task in Excel.
A screenshot showing example date ranges in Excel with specific overlap range

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:
A screenshot of Excel showing the date overlap formula applied in cells

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. Download and have a free trial now!

Screenshot of Kutools for Excel Formula Helper for counting specific days between dates

Best Office Productivity Tools

🤖 Kutools AI Aide: Revolutionize data analysis based on: Intelligent Execution   |  Generate Code  |  Create Custom Formulas  |  Analyze Data and Generate Charts  |  Invoke Kutools Functions…
Popular Features: Find, Highlight or Identify Duplicates   |  Delete Blank Rows   |  Combine Columns or Cells without Losing Data   |   Round without Formula ...
Super Lookup: Multiple Criteria VLookup  |   Multiple Value VLookup  |   VLookup Across Multiple Sheets   |   Fuzzy Lookup ....
Advanced Drop-down List: Quickly Create Drop Down List   |  Dependent Drop Down List   |  Multi-select Drop Down List ....
Column Manager: Add a Specific Number of Columns  |  Move Columns  |  Toggle Visibility Status of Hidden Columns  |  Compare Ranges & Columns ...
Featured Features: Grid Focus   |  Design View   |   Big Formula Bar   |  Workbook & Sheet Manager   |  Resource Library (Auto Text)   |  Date Picker   |  Combine Worksheets   |  Encrypt/Decrypt Cells   |  Send Emails by List   |  Super Filter   |   Special Filter (filter bold/italic/strikethrough...) ...
Top 15 Toolsets:  12 Text Tools (Add Text, Remove Characters, ...)   |   50+ Chart Types (Gantt Chart, ...)   |   40+ Practical Formulas (Calculate age based on birthday, ...)   |   19 Insertion Tools (Insert QR Code, Insert Picture from Path, ...)   |   12 Conversion Tools (Numbers to Words, Currency Conversion, ...)   |   7 Merge & Split Tools (Advanced Combine Rows, Split Cells, ...)   |   ... and more
Use Kutools in your preferred language – supports English, Spanish, German, French, Chinese, and 40+ others!

Supercharge Your Excel Skills with Kutools for Excel, and Experience Efficiency Like Never Before. Kutools for Excel Offers Over 300 Advanced Features to Boost Productivity and Save Time.  Click Here to Get The Feature You Need The Most...

Office Tab Brings Tabbed interface to Office, and Make Your Work Much Easier

  • Enable tabbed editing and reading in Word, Excel, PowerPoint, Publisher, Access, Visio and Project.
  • Open and create multiple documents in new tabs of the same window, rather than in new windows.
  • Increases your productivity by 50%, and reduces hundreds of mouse clicks for you every day!

All Kutools add-ins. One installer

Kutools for Office suite bundles add-ins for Excel, Word, Outlook & PowerPoint plus Office Tab Pro, which is ideal for teams working across Office apps.

Excel Word Outlook Tabs PowerPoint
  • All-in-one suite — Excel, Word, Outlook & PowerPoint add-ins + Office Tab Pro
  • One installer, one license — set up in minutes (MSI-ready)
  • Works better together — streamlined productivity across Office apps
  • 30-day full-featured trial — no registration, no credit card
  • Best value — save vs buying individual add-in