{{Age in years|2000}} yields 24–25.
{{Age in years|1900|1950}} yields 49–50.
Note that the template provides an age range: during the year 2015, someone born in 2000 is either 14 or 15 years old, depending on whether they have passed their birth date in the later year.
To display approximate birth year and current age given a particular date (e.g. when a dated reference mentions the age of a person), only works for living people.
To display approximate birth year and current age given several particular dates (e.g. when a dated reference mentions the age of a person), only works for living people.
