Typing & Productivity
Week Number
Choose a date to see its ISO-8601 week number (weeks start on Monday) and the local weekday name.
How to use Week Number
Step 1
Start
Open the tool and add your input.
Step 2
Adjust
Review the options and run the action.
Step 3
Get the result
Copy, download, or use the live result.
Week Number features
- ISO week
- Weekday name
- Defaults to today
Supported Formats / Details
Input formats
- Date
Output formats
- Week number
Supported formats
- Date
Frequently Asked Questions
Is this US week numbering?
It uses ISO weeks that start on Monday.
What about week 53?
Some years have a 53rd ISO week; the calculator follows that rule.
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