Date Calculator – Add and Subtract Days, Weeks, & Months
Use our date calculator to add or subtract days, weeks, months, or years from any date.
On this page:
How to Add Days, Weeks, or Months to a Date
You can also add days, weeks, or months to a date manually.
Step One: Identify the Start Date
The first step is to identify the start date. You can use a paper or digital calendar and find the starting date.
Step Two: Add Months
The next step is to add the months to the date. Advance the date on the calendar one month for each month you want to add.
Step Three: Add Weeks
Then, you can add the weeks to the date. Continue to advance the date on the calendar one week for each week you want to add.
Step Four: Add Days
Finally, add the days to the date. Just like before, advance the date on the calendar one day for each day you want to add. You can use this method to find the date 28 days from today, for example.
You might also be interested in our date range calculator to find the duration between two dates.