User blog comment:A Heroic Smurf/Smurfette's Age/@comment-1323688-20131202130217

Physically, she would be the same age as her male Smurf counterparts, around 100 to 150 years of age, depending on which media representation you're using (100 for the comics and possibly also the films, 150 for the cartoon show). Chronologically, I would subtract that number from the years that would elapse since her creation.