What week number is it today?
The page opens on today's date and shows the current week number, the Monday-to-Sunday range of that week, and how many weeks are left in the year. Change the date to look up any week — useful for sprint planning, school timetables, pregnancy weeks and payroll cycles.
ISO week vs Sunday-start week
Most of the world, including Indian offices and Excel's ISOWEEKNUM, uses ISO 8601: weeks start on Monday and week 1 is the week that contains the first Thursday of the year (so 1 January can belong to week 52/53 of the previous year). The US convention starts weeks on Sunday and calls the week containing 1 January week 1. Pick the system your calendar uses.
How many weeks in a year?
52 weeks and 1 day (2 days in a leap year), so a year has 52 or 53 ISO weeks: 2026 has 53 ISO weeks, 2027 has 52. Count the weeks between two dates with the date calculator.