About WeekNumber â Free ISO 8601 Week Number Calculator & Calendar With Week Numbers
Wondering what week number is it today? or how many weeks in a year? Use our tool to calculate the current week number instantly. Simply click any date in the calendar above and youâll see âwhat week is itâ and the full Monday-Sunday rangeâno page reload needed.
Many people search âhow many weeks in a yearâ but rarely get the exact figure. Our site automatically detects the total weeks for any year: 52 in common years and 53 in long years, keeping your rota, school timetable, or financial calendar accurate.
Quickly look up what week of the year, current week number, week number today, or convert between date and week number both waysâ100 % free, no login, fully ISO 8601 compliant.
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What can the WeekNumber calculator do?
Whether you need to know the week number for work, study, payroll, or agile Sprints, we provide:
- Live display of what week number it is today
- Full Monday-Sunday range for the current week
- How many weeks remain this year
- Interactive calendar: click any date to see its week
- Two-way conversion: date â week number
- ISO 8601 standard + shareable URLs
Week number lookup for every scenario
Work / Rota / Time-sheet
- which work week is it
- rota week number
- payroll week number
- current work week
- week number for timesheet
Education / School / Semester
- what school week is it
- teaching week calculator
- semester week number
- university week checker
- class week of the year
Finance / Accounting
- financial week number
- accounting week of year
- fiscal week calculator
- VAT week number
Project / Sprint / Agile
- sprint week number
- Scrum week calculator
- project week of year
- agile week counter