How to Convert Days to Weeks in Excel


You can use the following formulas in Excel to convert days to weeks:

Method 1: Convert Days to Weeks with Decimals (e.g. 16 days = 2.2857 weeks)

=(B2-A2)/7

Method 2: Convert Days to Whole Weeks (e.g. 16 days = 2 weeks)

=ROUNDDOWN(DATEDIF(A2, B2, "d")/7, 0)

Both formulas assume the start date is in cell A2 and the end date is in cell B2.

The following examples show how to use each formula in practice with the following list of start and end dates in Excel:

Example 1: Convert Days to Weeks with Decimals

We can use the following formula to find the number of weeks between the start and end dates in cells A2 and B2, respectively:

=(B2-A2)/7

We can type this formula into cell C2 and then click and drag it down to every remaining cell in column C:

Excel convert days to weeks

Column C shows the number of weeks (including decimal places) between each start and end date.

For example:

  • There are 2.2857 weeks between 1/1/2022 and 1/17/2022.
  • There are 19.1429 weeks between 2/1/2022 and 6/15/2022.
  • There are 25.2857 weeks between 3/1/2022 and 8/25/2022.

And so on.

Example 2: Convert Days to Whole Weeks

We can use the following formula to find the number of whole weeks between the start and end dates in cells A2 and B2, respectively:

=ROUNDDOWN(DATEDIF(A2, B2, "d")/7, 0)

We can type this formula into cell C2 and then click and drag it down to every remaining cell in column C:

Column C shows the number of whole weeks between each start and end date.

For example:

  • There are 2 whole weeks between 1/1/2022 and 1/17/2022.
  • There are 19 whole weeks between 2/1/2022 and 6/15/2022.
  • There are 25 whole weeks between 3/1/2022 and 8/25/2022.

And so on.

Note: This formula works by first using DATEDIF to calculate the difference between the dates in days, then divides by 7 to get the difference in weeks, then uses ROUNDDOWN to round down to the nearest integer.

Additional Resources

The following tutorials explain how to perform other common tasks in Excel:

How to Convert Days to Months in Excel
How to Calculate Days Between Date and Today in Excel
How to Calculate the Difference Between Two Dates in Excel

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