What Is the Date Calculator?
The Date Calculator shows you the number of days between two dates and lets you add and subtract days, weeks, months, or years to / from a date.
- Count days: Find the total number of days between two dates. Use it to calculate the days between dates or see how many days are left until a particular date like New Year's Day.
- Add days: Find the date after a given date. For example, "What date will it be six weeks from today?".
- Subtract days: Find the date before a given period. For example, "What date was it two weeks ago?".
If you're tracking time (not dates), use our online stopwatch, online alarm clock, and online timer for accurate times.
How to Use the Date Calculator
Count days between two dates
- Click the Count Days tab.
- Set a Start date and End Date, or click Today to use today's date.
- Click Calculate to see the duration between the dates in days, weeks, months, and years.
Use the calculation settings to include the end date (which adds one day to the result) and exclude days (for example, weekends).
Add days to a date
- Click the Add Days tab.
- Select the Start date, or click Today.
- Set the Years, Months, Weeks, or Days to add to the date.
- Click Calculate New Date to see the new date.
Subtract days from a date
- Click the Subtract Days tab.
- Select the Start date, or click Today.
- Set the Years, Months, Weeks, or Days to subtract from the date.
- Click Calculate New Date to see the new date.
Why Use the Date Calculator?
Dates aren't evenly spaced, which makes it difficult to count the days over long periods.
This date calculator handles leap years and month lengths automatically, so you get an accurate day calculation. You can use it to plan trips, schedule deadlines and delivery dates, count the remaining days until a birthday, or even calculate your age in a more exciting way!