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by | Dec 22, 2013 | Publications. VIX is a measure of expected volatility calculated as 100 times the square root of the expected 30-day variance (var) of the S&P 500 rate of return. The variance is annualized and VIX expresses volatility in percentage points.
Another way to calculate age is with the DATEDIF function. =DATEDIF(Date1, Date2, Interval). where Date1 is the birthdate, Date2 is today's date and Interval is the interval type (y for years m for months and ym for months in the same year). This formula displays age in years for a date in cell A1:ere are two methods of calculating age from a date of birth in Excel: a formula method using three cells, and the DATEDIF function. 1 How to calculate age using a formula. To calculate your age from your date of birth in Excel requires using three cells.