How to calculate days between dates?

Our Days Between Dates Calculator gives you the exact difference between any two dates in multiple units: total days, complete weeks, approximate months, years, and working days (Monday to Friday).

Use the quick preset buttons to instantly calculate common date ranges — the next 7 days, 30 days, 100 days, or a full year from today. You can also enter any custom start and end dates.

Common uses include calculating deadlines, project timelines, countdowns to events (holidays, birthdays, anniversaries), and determining how long ago something happened.