Date Calculator
Find days between dates or add/subtract time from any date
How the Date Calculator Works
The Days Between Dates tab counts the exact number of days, weeks, weekdays, and weekends between any two dates. It is useful for calculating deadlines, project timelines, or how long until a future event.
The Date Math tab lets you add or subtract days, weeks, months, or years from any starting date to find a resulting date. Useful for calculating expiration dates, 30/60/90-day deadlines, or planning ahead.
Frequently Asked Questions
Enter both dates in the Days Between Dates tab and the result appears instantly — in days, weeks, months, and years.
No — it counts from the day after the start date to the end date. To include both dates, add 1 to the result.
Yes — use the Date Math tab. Enter your starting date, choose Add, type the number of days/weeks/months/years, and see the resulting date.
Set the start date to today and the end date to your target date. The calculator shows exactly how many days remain.