Date Difference Calculator

Calculate how many days & weeks between two dates, count each weekday, and find week number up to today.

Results

Basic Stats

  • Total Days:
  • Full Weeks:
  • Remainder:
  • End on:
Year-progress bar

Weekday Counts

About Date Difference Calculator – Count Days, Weeks & Weekdays Online

Whether you need to know how many days between two dates, how many weeks since a date, or how many Mondays/Tuesdays appear in a period, our free tool gives you instant answers following the ISO 8601 standard. No login, no data upload, and results can be copied or shared with one click.

Popular Search Scenarios

  • γ€ŒHow many weeks since June 1, 2025 to today?」— Find week number from any past date.
  • γ€ŒDays between dates calculator」— Countdown for contracts, visas, rentals, trials.
  • γ€ŒHow many Mondays in a date range?」— Payroll, rota, class timetable, shift planning.
  • γ€ŒHow many weeks in a year?」— Fiscal weeks, school timetables, agile Sprints.
Tech note: All calculations run locally in your browserβ€”fast, private and offline-ready (PWA). Need more? Try our Date β†’ Week, Week β†’ Date and Today Week Number tools.