FIDE rating would probably be a bit higher, i'd say around 1650-1700
what is the equivalent level in Fide for someone who has 1500 in chess.com?
I would think the online rating is probably inflated compared to FIDE.
There is no reason why that would be the case

The consensus seems to be 100-200 points lower, but there’s no way to know for sure. Also, since there really isn’t classical on chess.com, there’s absolutely no way to reliably compare yours to a classical rating.

My FIDE is very very low compared to my online rating across all sites, and my national federation rating.
Maybe it's because I don't play in FIDE tournaments, but FIDE rating is much harder to gain in general, compared to online chess.
But a beginner will rarely, if ever, go to a tournament. The weakest players you’ll see at a tournament would be like an 800 chess.com rated player. And since at the tournament he’s the lowest and wouldn’t win any matches, he would have an extremely low FIDE ranking, even lower than 800.
But a beginner will rarely, if ever, go to a tournament. The weakest players you’ll see at a tournament would be like an 800 chess.com rated player. And since at the tournament he’s the lowest and wouldn’t win any matches, he would have an extremely low FIDE ranking, even lower than 800.
but that should only effect beginners really. It won't have a big effect for intermediate and top level players.

It also depends on one more factor, Some players play much better OTB compared Online and some play Online better than OTB. In general I have observed, Players having 100-200 higher rating online compared to OTB.

What is the equivalent level in FIDE for someone who has 1500 here? 1800 ? Do you know ? Thanks
+/- 150

What is the equivalent level in FIDE for someone who has 1500 here? 1800 ? Do you know ? Thanks