ISOWEEKNUM Google Sheets Formula
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ISOWEEKNUM Formula Syntax
Example Use Case
Returns the ISO week number of a given date in Google Sheets.
Understanding the ISOWEEKNUM Function in Google Sheets
The ISOWEEKNUM function returns the ISO week number (1-53) for a date, where weeks start on Monday.
Why Use ISOWEEKNUM in Google Sheets?
ISOWEEKNUM is useful for international date tracking, like project timelines or reporting.
Example with Sample Data
| Date | Formula | Result |
|---|---|---|
| 2025-02-25 | =ISOWEEKNUM("2025-02-25") | 9 |
| 2023-12-31 | =ISOWEEKNUM("2023-12-31") | 52 |
| 2024-01-01 | =ISOWEEKNUM("2024-01-01") | 1 |
The table shows how ISOWEEKNUM calculates ISO week numbers.
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