Week Number
Find the ISO week number (1-52/53) for any date. Follows ISO 8601 standard with Monday as the first day. Free online wee
Result will appear here...
How to Use Week Number
- Select a date: Choose any date to find its ISO week number.
- View the week number: The tool shows the ISO 8601 week number (1-52/53) based on Monday as the first day of the week.
- Use for planning: Perfect for Agile sprint planning, corporate scheduling, and financial week-based reporting.
About Week Number
Week Number Calculator determines which week of the year (from week 1 to 52/53) a specific date falls in.
- ISO Standard: Follows corporate and European standards (ISO 8601) where the week starts on a Monday.
- Project Planning: Agile development, sprints, and corporate schedules often run on week numbers (e.g., CW 42).
- Financial Year: Provides a reference point for accounting teams creating quarterly or weekly financial reports.
Simplifies calendar management for business and corporate professionals.
Frequently Asked Questions
What is an ISO week number?
ISO 8601 defines weeks starting on Monday, numbered 1-52 (or 53). Week 1 is the first week containing a Thursday.
What is the current week number?
The tool shows the current week number by default when you load it. You can also enter any date to find its week number.
Why are week numbers used in business?
Companies use week numbers for sprint planning, project timelines, financial reporting, and scheduling. It's common in Agile development.