📅 Week Number Calculator
Find what week number of the year any date falls on. Current week, day of year, days remaining.
Week Number
13
of 2026
Day of Week
Friday
Month
March
Day of Year
86 of 365
Days Remaining
279 days
Weeks Remaining
40 weeks
Year
2026
FAQs
Q: What is the current week number?
A: For today's date (2026-03-27), the week number is 13 in 2026.
Q: How is the week number calculated?
A: Take the day of the year (1-366), divide it by 7, and round up. Example: Day 15 → ceil(15/7) = Week 3.
Q: What is an ISO week number?
A: In the ISO 8601 standard, the week starts on Monday, and the first week with a Thursday in the new year is Week 1.