WEEKNUM Function in Excel: Syntax, Examples and Free Practice
WEEKNUM is an Excel Date & Time function. Returns which week of the year a date falls in.
WEEKNUM syntax
Arguments
serial_number: The date or time value to evaluatereturn_type: Which numbering system to use for the result (optional)
When to use WEEKNUM
WEEKNUM is used in scheduling, deadline tracking, and reporting that spans specific date ranges.
Practice WEEKNUM online, free
Open the live Excel-style spreadsheet and try WEEKNUM yourself. No Excel install or sign-up needed to start.
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Frequently asked questions
What does the WEEKNUM function do in Excel?
Returns which week of the year a date falls in.
What is the syntax of WEEKNUM in Excel?
The syntax is =WEEKNUM(serial_number, [return_type]). serial_number: The date or time value to evaluate; return_type: Which numbering system to use for the result (optional).
Where can I practice WEEKNUM online for free?
Open the free live spreadsheet on Cellgrids and try WEEKNUM yourself. No Excel install is needed and you can start without signing up.
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