Weeks Calculator – Add Weeks to Date

Add weeks to a date using our week calculator below. You can also subtract weeks from the date by using a negative weeks value.

How to Add Weeks to a Date

From planning vacations to managing projects, adding weeks to a specific date is something that you’ll occasionally need to do. You can use a few methods to calculate what the date will be in several weeks.

Method One: Add Weeks on a Calendar

The first way to add weeks to a date is to use a calendar. Start by locating the start date on the calendar.

Then, find the date one week from that date and continue the process for each week you want to add.

This is the same process that’s used to add days to a date.

Method Two: Add Weeks Using Spreadsheet Software

You can also add weeks using spreadsheet software, including Microsoft Excel or Google Sheets. You can use a simple formula to add weeks, just like adding other numbers.

Open a new sheet and then enter the start date in cell A1. Then, in another cell, enter the following formula to add six weeks to the start date:

=A1 + (6 × 7)

This will add six weeks to the start date in cell A1. In the formula, the 6 weeks value is multiplied by 7 to convert weeks to days, which is what the formula expects when adding to a date.