Date Calculator

Find the time between two dates or add and subtract days, weeks, months and years from any date.

Start Date

End Date

Include the end date

Start Date

Operation

Amount

Unit

Choose dates above to calculate a date difference.

How to Calculate the Time Between Two Dates

Select a start date and end date to see the total number of days and weeks between them. The calculator also shows a calendar-style difference in years, months and days.

Add or Subtract Time From a Date

Use the Add / Subtract Time tab to move forward or backward by a number of days, weeks, months or years. The resulting date and day of the week are shown instantly.

Include the End Date

Normally, the difference between two dates counts the elapsed time from the start date to the end date. Enable “Include the end date” when you want both boundary dates counted.