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## Excel Formula: Calculate expiry date

If there are hundreds of food products in a store with different produce dates and warranty periods, you may want to know the expiry date of each product. Here, in this tutorial, it provides some formulas to calculate expiration date in Excel.

Here are some different expiration calculating types, the tutorial will introduce and explain the formulas one by one

#### 1 Calculating expiration date n days in the future

Generic formula:

 start_date+warranty

Arguments

 Srart_date: the start date of the product. Warranty: the total period that guarantee quality.

How this formula work

For instance, cell C3 contains the start date of a product whose warranty period is 100 days, please use below formula to get the expiration date.

 =C3+100

Press Enter key.

#### 2 Calculating expiration date in end of current month

Generic formula:

 EOMONTH(start_date,0)

Arguments

 Srart_date: the start date of the product.

Return value

This formula returns a serial number. In Excel, dates are stored as serial numbers for calculation. January 1, 1900 is defined as 1, similarly, July 3, 2020 is defined as series number 44015.

How this formula work

For instance, cell C4 contains the start date of a product which guarantees quality until the end of current month, please use below formula to get the expiration date.

 =EOMONTH(C4,0)

Press Enter key to get a serial number.

Then format the serial number as date format by clicking Short Date from the drop-down list of Number Format under Home tab.

Explanation

EOMONTH function: Get the last day of a given number of months in future or past.

Return value

This formula returns a serial number. In Excel, dates are stored as serial numbers for calculation. January 1, 1900 is defined as 1, similarly, July 3, 2020 is defined as series number 44015.

#### 3 Calculating expiration date n months in the future

Generic formula:

 EDATE(start_date,months)

Arguments

 Srart_date: the start date of the product. Month: the number of months for keeping quality.

Return value

This formula returns a serial number. In Excel, dates are stored as serial numbers for calculation. January 1, 1900 is defined as 1, similarly, July 3, 2020 is defined as series number 44015.

How this formula work

The cell C5 contains the start date of a product whose shelf life is 2 months, please use below formula to get the expiration date.

 =EDATE(C5,2)

Press Enter key to get a serial number.

Then format the serial number as date format by clicking Short Date from the drop-down list of Number Format under Home tab.

Explanation

EDATE function: Add n months for a date.

Note:

If the item’s expiration date is n years in the future, you also use the formula EDATE(start_date,month). For instance, the start date is 3/1/2020, the warranty period is 1 year (12 months), use the formula:=EDATE(C6,12).

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