@micvalpro -
He should be at minimum 18 years old, maybe 19.

@Chewtoy - I'm thinking that it starts right where we left off and then there'll be a time jump to a few months later.

@AndrewHolland -

I'd say this is more an example of Tom Holland finally being such a busy actor that he now doesn't have the time to "lose" his previous character in-between shoots. It's one thing to play Nathan Drake for 12 weeks, hang out for 2 months and then start prep for your next role because you aren't that busy as an actor. It's a whole other story to have jump straight into Peter Parker a week or 2 after you were deeply entrenched in playing a completely different person

@Scarilian - he's not 19, unless there are a few years between FFH and Spider-Man 3

- Peter is 15 in Homecoming (he specifically says that to Tony)
- Infinity War takes place shortly afterward (a few months, Tony and Pepper are only recently engaged as of the end of Homecoming) so roughly 16
- He's the same age when he returns in Endgame 5 years later
- FFH is set a few months after Endgame; dialogue in the movie confirms that Flash is 16 (he tries to buy alcohol, MJ points out that he's not actually 21 because he was blipped, 21-5=16, and she specifies 21 and not "over 21")
- From what I can see, most students graduate High School in the US at 18, explaining why he was still in High School last time we saw him - bare in mind, he's very smart so it's highly unlikely he'd need to repeat any grades, although they do mention having to restart the academic year due to the blip.

So, assuming Spider-Man 3 picks up shortly after FFH (which I imagine it would, based on the cliffhanger ending) Peter would be around 17. If they do set the movie a year or so after the events of FFH though, then you'd be absolutely right with an estimate of 18/19. I don't think we'll know either way until the movie actually comes out though, and to be honest I wouldn't be surprised if they start glossing over it altogether at this point.

@Scarilian - I'm gonna start off by saying Spider-Man being born in 2001 makes me feel so old 😂

Aside from that, I believe I stand corrected! That's some impressive sleuthing there 👍

@AC1 -
Same, if it helps his original birthday was probably 2003 (More on that below) Still feel old though.

@MARVELFAN1995 -
Sony's messed up a LOT of things regarding ages, timeline and dates - generally all of those aspects should be dismissed as they heavily contradict the MCU. These films were made with virtually no awareness of the rest of the MCU movies.

Homecoming was at one stage set in 2018, due to the title crawl (8 years after Avengers which took place in 2010) and Peter would have been 15.

Far From Home was at one stage set in 2019 which would have made Peter 16.

It is impossible for Peter to be 16 in Far From Home in the MCU timeline though as that would require the events of the film to take place in 2017 (or 2019 by Sony timeline) which is either pre-dating the Snap or during the five years after the snap.