Microsoft Excel can perform thousands of different types of data manipulations and calculations. This article will teach you how to use Excel formulas to add a specific number of days to a date.

1] Add days directly If the expiry period is defined in days, you can calculate the expiry date by simply adding the number of days to the starting date using the + operator.

We show you how to use Excel to count days between two dates using the DAYS, DATEDIF, NETWORKDAYS, and TODAY functions, and Subtraction.