calculators
Calendar Week Calculator
Enter a year and ISO week number to see the Monday and Sunday dates of that week. Free and client-side.
Quick answer
Calendar Week Calculator is a free online tool that helps you find start and end date of an iso week. Enter a year and ISO week number to see the Monday and Sunday dates of that week. Free and client-side.
Calendar Week Calculator FAQ
What is an ISO week?
ISO weeks start on Monday. Week 1 is the week containing the first Thursday of the year.
What format is the output?
The output shows the Monday date and Sunday date of the selected week.
Is my data sent to servers?
No. All calculations happen locally in your browser.