Talk:Rimuru Tempest/@comment-37816551-20200214195441/@comment-10330822-20200215004148

It's still 37. His age in the infobox inclues his past life 37 at the time of death and 2 years as slime, so his total life is 39.

That other place is probably stating his age in the WN, this page covers his age as of the LN, which is 2 years after his death. If you click on his WN tab, you'll see those WN's stats.