deepcalc
DocsISOWEEKNUM

ISOWEEKNUM

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Returns ISO week number of a date.

  • Excel: Verified match
  • Google Sheets: Verified match
  • Returns: Number

Examples

=ISOWEEKNUM(DATE(2026,7,27))
Result 31

Syntax

ISOWEEKNUM(date)
date
number required
DATECreates date from year, month, day. DATEDIFCalculates difference between two dates. DATEVALUEConverts date text to serial number. DAYReturns day of month from date. DAYSReturns number of days between two dates. DAYS360Returns days between dates on 360-day year.