Free tool
Weeks between two dates
Convert a date span into days, full weeks, remaining days, and ISO weeks touched.
Days28
Full weeks4
Remaining days0
ISO weeks touched5
2026-09-05 to 2026-10-03
The two dates are 28 days apart. That equals 4 full weeks. The date span touches 5 ISO weeks.
What does “ISO weeks touched” mean?
A date range can include part of several numbered weeks. This figure counts the distinct Monday-to-Sunday ISO weeks that overlap the selected range, rather than only complete seven-day blocks.