How to Calculate the Number of Weeks Between Two Dates in Excel

Dataset Overview

Let’s assume we have a dataset, namely the Everest Base Camp Expedition timeline.

Method 1 – Using the INT Function

Subtract the Dates:

• Select cell D5.
• Enter the following formula:

• Here, C5 represents the ending date, and B5 represents the starting date.
• The subtraction calculates the number of days between the dates.
• Dividing by 7 gives the number of weeks.
• The INT function ensures we get an integer value.

Fill Down:

• Press ENTER.
• Drag the Fill Handle from cell D5 to D15 to apply the formula to the entire range.

• The final output is shown below.

Method 2 – Applying the ROUNDDOWN Function

Calculate Weeks:

• In cell D5, enter:

• This formula rounds down the result to the nearest whole number of weeks.

Fill Down:

• Press ENTER.
• Use the Fill Handle to copy the formula down to cell D15.

• The final output is shown below.

Read More: Excel Formula to Count Days from Date

Method 3 – Utilizing the DATEDIF Function

Weeks with DATEDIF:

• Enter the following formula in cell D5

• The DATEDIF function calculates the difference between dates in days (“d”).
• Dividing by 7 gives the weeks.

Fill Down:

• Press ENTER.
• Use the Fill Handle to copy the formula down to cell D15.

• The final output is shown below.

Method 4 – Employing the WEEKNUM Function

Weeks Using WEEKNUM:

• Suppose you have a dataset as shown.

In cell D5, enter:

			
=WEEKNUM(B5)-WEEKNUM(B5) 
			

• The WEEKNUM function returns the week number in a year.
• We use it twice for each date to find the difference in weeks.

Fill Down:

• Press ENTER.

• Use the Fill Handle to copy the formula down to cell D15.

• The final output is shown below.

Additional Calculations:

Weekdays Between Dates:

• To find weekdays, enter:

• This counts the number of days between the dates.

• Then press ENTER.

• Then drag the Fill Handle tool from cell D5 to D15 to get the other value.

• As a result, the output looks like this.

Read More: Excel Formula to Calculate Number of Days Between Today and Another Date

Months Between Dates:

• For months, enter:

• This counts the number of months.

• Then press ENTER.

• Drag the Fill Handle tool from cell D5 to D15 to get the other value.

• As a result, the output looks like this.

Read More: How to Count Months from Date to Today by Using Excel Formula

Years Between Dates:

• To find years, enter:

• This calculates the number of years.
• Press ENTER.

• Next, drag the Fill Handle icon.

• As a result, the output looks like this.

Practice Section

We have provided a practice section on the right side of each sheet so you can practice yourself.

Download Practice Workbook

You can download the practice workbook from here:

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