Using Weeknum in apple numbers

Using numbers v14.1 on Mac can weeknum ref a cell?

WEEKNUM("01/9/2025",1) returns the week number but can the date be in a different cell?

for example if the date is in F3 then WEEKNUM("F3",1) does not work, is there a way of doing this?

iMac 21.5″ 4K, macOS 13.7

Posted on Sep 1, 2025 02:43 AM

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3 replies

Sep 2, 2025 11:17 AM in response to Notehideas

This is also true for any reference in Numbers.


If the value is quoted, it's taken as a literal string entry, so "F3" is interpreted as, literally, the characters F and 3. Clearly there's no way Numbers can infer a 'week number' from "F3"


Without the quotes Numbers interprets the values as references, so F3 is taken as the current value of the cell F3, which is what you want in this case.

Using Weeknum in apple numbers

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