How Old Is Lady Galadriel

So galadriel is canonically 36. 7 years old on the first day of the second age. On the last day of the second age 3441 years have passed, which in elven would be 23. 89 years. If galadriel is from the generation before elrond (in elvish terms), then shes roughly twice his age. She matured in one age of arda, wedded and had children in the next,. With galadriel being born in yt 1362, that means she lived for 138 years in valinor, as the years of the trees ended in 1500.

Galadriel is around 2,425 years old during the events of the lord of the rings: The rings of power, although it's impossible to determine exactly because the show collapses a lot of events.