Formulas > =ISOWEEKNUM()

# How To Use ISOWEEKNUM() Function in Google Sheets

Description

Returns the number of the ISO week of the year where the provided date falls.

Common questions about the ISOWEEKNUM formula include:
-What is the syntax of the ISOWEEKNUM formula?
-How can I use the ISOWEEKNUM formula to create charts and/or graphs?
-What values can I use with the ISOWEEKNUM formula?

The ISOWEEKNUM formula can be used appropriately to return the ISO week number for a given date, a number from 1 to 53.

The ISOWEEKNUM formula can be commonly mistyped as AISOWEEKNUM.

Common ways the ISOWEEKNUM formula is used inappropriately include using different date formats than the expected one, such as DD/MM/YY instead of DD/MM/YYYY, or using time instead of dates.

Common pitfalls when using the ISOWEEKNUM formula include attempting to return a year instead of a week number, or not accounting for holidays or other nonworking days when calculating week numbers.

Common mistakes when using the ISOWEEKNUM formula include using an incorrect date format, returning the wrong type of date (such as year instead of week number), or forgetting to account for holidays and other nonworking days when calculating week numbers.

Common misconceptions people might have with the ISOWEEKNUM formula include thinking that the formula is used to calculate a date instead of a week number, or that the formula defaults to US week numbers instead of ISO ones.

How To Actually Use ISOWEEKNUM() in Sheets

`ISOWEEKNUM(date)`

Looking for a video tutorial? Members can email me anytime! Check out the blogs below for more info on this formula. Or generate your formula. Find more formulas here at BetterSheets.co/formulas

Find the Week Number in Google Sheets with the ISOWEEKNUM Function

Learn to use the ISOWEEKNUM function to find the ISO week number for a given date. Will be from 1 to 54. See several examples of how to use the function.

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