Crystal Reports Training by Ken Hamady, MS, Reporting and Training Nationwide

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Crystal Reports formula examples from
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## Calculating an accurate
Age:

I was surprised that this
formula
needed to be written. The problem with calculating age is
that
it is calculated as an integer, and always rounded down. If you
are
20 years and 364 days old, you are considered 20. The next day you gain
one
whole year in age. My old formula was simply to subtract
date
of birth from current date and divide by 365.25. The result is
pretty
accurate as long you are showing some decimal places and not rounding
up.
But in testing this accross leap years I found that about 1 out of 1000
people
could be listed as one year younger than they are, for one
day.
To get a reliable Integer age you can use the formula below.
WhileReadingRecords;

DateVar Birth:=
{ages.Birth};
// Replace this with your field for Date Of Birth

DateVar Ann :=
{ages.DateAnn};
// Replace this with CurrentDate to get their age as of the time of the
report

//or the date field of an event to get their age as
of
the time of that event.

if (Month(Ann) * 100) + Day
(Ann)
>=(Month(Birth) *100) + Day (Birth)

then Year (Ann) -
Year(Birth)

else Year (Ann) -
Year(Birth)
-1