Converting Days to Years in Excel

Use Excel's DATEDIF function for converting days to years. This function calculates the time difference between two dates in years, months, or days. The syntax for years is DATEDIF(start_date, end_date, "y").

Using DATEDIF Function

For age calculation, apply =DATEDIF(A2,NOW(),"y") in a cell. Replace A2 with the cell containing the birth date to get the person's age in years.

Calculating Year Column from Date

Utilize YEAR, MONTH, and DAY functions to extract the year, month, and day from a date, respectively. To calculate the YEAR column from a date column, use the YEAR function with the date as an argument.

Calculating Purge Date

Calculate a purge date by adding 7 years to a date. If the subject is 18 or older, add 7 years to the exam date. If under 18, add 7 years to the 18th birthday date.

Common Use Cases

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  Calculating the age of individuals from their birthdates
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  Determining the duration of warranties or service agreements in years
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  Tracking the maturity of financial instruments such as bonds
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  Analyzing long-term trends in data collected daily
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  Converting membership or employment durations from days to years for reporting

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