Current Week Number
16
Saturday, April 18, 2026
Select Date
Calculation based on ISO-8601 standard.
How it works
Quickly determine the current calendar week or convert any date into a week number.
The tool instantly shows you today's calendar week. Use the date field to select a specific day to determine its CW number according to the ISO-8601 standard. This is particularly helpful for scheduling and project coordination.
Processing happens entirely locally in your browser.