Skip to content
Free Excel Tutorials
  • Home
  • Excel For Beginners
  • Excel Intermediate
  • Advanced Excel For Experts

Data Analysis

  • How to conditionally sum numeric data in an Excel table using SUMIFS
  • Everything about Charts in Excel
  • How To Create Pareto Chart in Excel
  • How to Create Area Chart in Excel
  • How to Create Column Chart in Excel

References

  • Count unique text values with criteria
  • How to create dynamic named range with OFFSET in Excel
  • How to retrieve first match between two ranges in Excel
  • MATCH function: Description, Usage, Syntax, Examples and Explanation
  • How to use Excel VLOOKUP Function

Data Validations

  • Excel Data validation unique values only
  • Excel Data validation must contain specific text
  • Excel Data validation must begin with
  • Excel Data validation require unique number
  • Data validation must not exist in list

Calculate date overlap in days in Excel

by

If you need to calculate the number of days that overlap in two date ranges, then this tutorials is for you.

You can use basic date arithmetic, together with the the MIN and MAX functions. See example below;

Formula

=MAX(MIN(end1,end2)-MAX(start1,start2)+1,0)

Explanation

In the example shown, the formula in D6 is:

=MAX(MIN(end,C6)-MAX(start,B6)+1,0)

How this formula works

Excel dates are just serial numbers, so you can calculate durations by subtracting the earlier date from the later date.

This is what happens at the core of the formula here:

MIN(end,C6)-MAX(start,B6)+1

Here are are simply subtracting an earlier date from a later date. To figure out what dates to use for each date range comparison, we use MIN to get the earliest end date, and MAX to get the latest end date.

Finally, we use the MAX function to trap negative values and return zero instead. Using MAX this way is a clever way to avoid using IF.

Post navigation

Previous Post:

COSH function: Description, Usage, Syntax, Examples and Explanation

Next Post:

Excel Data validation require unique number

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Learn Basic Excel

Ribbon
Workbook
Worksheets
Format Cells
Find & Select
Sort & Filter
Templates
Print
Share
Protect
Keyboard Shortcuts

Categories

  • Charts
  • Data Analysis
  • Data Validation
  • Excel Functions
    • Cube Functions
    • Database Functions
    • Date and Time Functions
    • Engineering Functions
    • Financial Functions
    • Information Functions
    • Logical Functions
    • Lookup and Reference Functions
    • Math and Trig Functions
    • Statistical Functions
    • Text Functions
    • Web Functions
  • Excel VBA
  • Excel Video Tutorials
  • Formatting
  • Grouping
  • Others

Logical Functions

  • OR function Examples in Excel
  • IF with boolean logic in Excel
  • NOT function: Description, Usage, Syntax, Examples and Explanation
  • FALSE function: Description, Usage, Syntax, Examples and Explanation
  • OR function: Description, Usage, Syntax, Examples and Explanation

Date Time

  • Convert Excel time to decimal seconds
  • Display Days until expiration date in Excel
  • DATE function: Description, Usage, Syntax, Examples and Explanation
  • ISOWEEKNUM function: Description, Usage, Syntax, Examples and Explanation
  • Convert Excel time to decimal hours in Excel

Grouping

  • Categorize text with keywords in Excel
  • Group numbers at uneven intervals in Excel
  • How to randomly assign people to groups in Excel
  • Group numbers with VLOOKUP in Excel
  • Calculate conditional mode with criteria in Excel

General

  • How to calculate percent variance in Excel
  • List worksheet index numbers in Excel
  • With vs Without Array Formula in Excel
  • Cell References: Relative, Absolute and Mixed Referencing Examples
  • 44 Practical Excel IF function Examples
© 2025 xlsoffice . All Right Reserved. | Teal Smiles | Abbreviations And Their Meaning