Weeks Calculator

Weeks Calculator – Add Weeks to Date

Easily add weeks to any date using our week calculator below. You can also subtract weeks by entering a negative value for quick date adjustments.

How to Add Weeks to a Date

Whether you’re planning a vacation, setting deadlines, or managing a project timeline, adding weeks to a specific date helps you quickly determine a future date. There are several simple ways to do this, depending on what tools you prefer.

Method 1: Add Weeks Using a Calendar

One straightforward approach is to use a calendar. Start by identifying your original date on the calendar. From there, move forward by one week at a time, counting each full week until you reach the total number of weeks you want to add.

This method works just like adding days to find a future date—each week represents seven days, so you’re simply moving ahead in consistent weekly steps.

Method Two: Add Weeks Using Spreadsheet Software

Another easy way to add weeks to a date is by using spreadsheet software such as Microsoft Excel or Google Sheets. Spreadsheets treat dates as numbers, which makes it simple to add weeks with a basic formula.

To get started, open a new spreadsheet and enter your starting date into any cell, for example, cell A1. Then, in another cell, use the following formula to add six weeks to that date:

This formula adds 56 days (8 weeks × 7 days) to your starting date.

This formula calculates the date that is six weeks after the date in cell A1. The number of weeks (6) is multiplied by 7 to convert weeks into days, since spreadsheets add dates using days.

If you need to add a different number of weeks, just replace 6 with the number of weeks you want to calculate.