Convert an ISO week number to a date range.
Input the ISO week number (1-53) and the year. The tool will provide the start and end dates for that specific week....
Enter values to see the result.
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The ISO week date system is widely used in business, finance, and manufacturing to plan production cycles and report fiscal results. However, knowing that a milestone is in 'Week 42' doesn't help you plan your daily schedule unless you know the specific dates that week covers. Our Week Number to Date tool solves this problem instantly.
Simply enter a week number and a year, and our tool will provide the full date range, from the Monday start to the Sunday finish. This is essential for aligning cross-functional teams who might use different calendar views but need to stay synchronized on the same 7-day period.
Eliminate the guesswork of leafing through a physical calendar. Our engine follows strict ISO-8601 standards, ensuring your dates are always accurate, regardless of the year.
Enter the number of the week you want to look up (usually between 1 and 52).
Specify the year for the week number.
The results will immediately show the 'Monday to Sunday' range for that period.
Due to the cycle of the Gregorian calendar, some years contain 53 ISO weeks to keep the calendar aligned with the seasons.
By international standard (ISO-8601), all weeks begin on Monday.
No, many US calendars start the week on Sunday. This tool follows the international ISO standard (Monday start).
Built on international date standards for global compatibility.
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