How many days to spend in Prague

Yes, that's enough to see the main sites. It's a lovely city and you may not want to leave unless you get tired of the big crowds on the Charles Bridge and in the main square - the city does get a lot of tourists. But generally, it's a fairly compact city for tourist sightseeing.

If at all possible, go for 3-4 days.

Yes two days enough .

We spent 5 last May .

That was 2 days too long for us .

If you get tired of the crowds on the Charles Bridge, as I did, go to the next bridge over and have a pleasant stroll, with the same view of the city and the river.

It all depends on how you define "main sites". You should review the sightseeing section of a good guidebook. That should give you an idea of your own can't-miss sights.

After 2 full days it will be nice to get away from the crowds.

I spent 2.5 days in Prague this past December and could have used an extra day. I know everyone mentions the crowds but to me it was not that bad at all. I am sure that it gets worse though the summer months. Maybe it is because I live in a bigger city so having people around is just part of my 'normal'.

We spent 4 nights (it was our arrival city, so we had a half day with jet lag/tiredness, then 2 more full days and a morning). I thought it was perfect. Did a few guided tours (one with airbnb and one with Naked Prague). I felt like I saw everything that was high on my list - missed a few smaller things, but I could do it all without feeling rushed.

I spent seven full days in Prague; I knew I needed more but the Schengen clock was winding down. I had no trouble finding interesting things to see that mostly kept me out of the extreme tourist crowds. The situation in Old Town is unfortunate, but there's a lot to see in the city.

IMO two days will be very rushed. We spent 5 days in Prague and were never bored. However one of those was a day trip to Terezin. The crowds did not bother us, but you may want to walk the Charles Bridge early in the morning.

We spent 6 nights in Prague with one day trip out of the city and it was not enough for us. We did spend a lot of time going "off center" as our hotel clerk called it. I plan to go back again. It remains one of my favorites. We stayed in old town so spent our days out of the main tourist area.

It just goes to show to each their own.
I recommend www.tasteofprague.com. If your love hamburgers - Dish. If you love specialty cocktails - Hemingways. If you love quick, easy good food - Lokal. If you love good beer - anywhere. If you love art noveau- it's a dream.

Two days is not enough. You will leave feeling short changed. We had 10 days there over New Years several years ago, with a couple day trips. Prague has an amazing amount of history if you do your research. Here are some of my bookmarks from that trip:

https://www.pragueexperience.com/

https://www.ticketsonline.cz

https://www.eatingeurope.com/prague/

The prevalent and persistent point about crowds in Prague on this site is overstated.

Over New Years the crowds are probably no worse than Vienna in July.

"The prevalent and persistent point about crowds in Prague on this site is overstated". really depends on what time of year and what time of day.In August try and walk across Charles bridge and through the Royal route and you know what a crowd is.i have passed through the castle area in the period between Christmas and new year and I have never seen such queues for tickets or indeed queues for security,in fact I posted an apology on the forum to folk when I suggested they use the castle steps area to enter the castle area, that was crazy busy .Iast October I took my Bil across Charles bridge at 7.30 on a Sunday morning, very quiet , returned that way 4 hours later and you could hardly move.
In reply to the OP I would say for a first trip 3 or4days will let you see most of the most visited sights.But there really is a great deal more to Prague that what is in the guide books and the city is a real joy when you get away from the well worn tourist routes.

Over New Years the crowds are probably no worse than Vienna in July.

I can't really say, as I haven't been to Vienna in July. Only in September. And I wouldn't disagree that Prague was pretty crazy on New Years Eve. In fact that was part of the fun. As you could imagine, you could almost hear a pin drop up to about noon on January 1.

In general though, I'm not disagreeing that Prague is popular and therefore lots of people visit and the compact old Town area, Charles Bridge and others can therefore be crowded. There are many posts on this forum about managing ones time in Prague to minimize exposure to crowds. It needs to be an element of trip planning.

Like any city (Venice comes to mind) - there are crowded spots and there are quiet spots. We were there in mid-Sept and trying to go see the Astrological clock at the top of the hour - a MASS of people (our walking tour guide also said it's prime pickpocketing time). We went back in the evening and whilst there seemed to be some bachelor parties going on (ugh) it was way less crowded. But we just missed the top of the hour theatrics.

We went to the Charles Bridge a few times and once it was very crowded - dodging people and e-scooters (ah yes - the e-scooters) the whole way across. If you go early or later, it's not as crowded. And luck comes into it - when I was waiting to get into St Vitus, the line was almost around the corner of the church with a couple hundred people in front of me - when I had my go thru and came out, the line had shrunk to maybe 40-50 people.

Hi everyone,

Thanks so much for the feedback. The way I have the itinerary setup it currently leaves for about 2.5 days in Prague. I am debating trying to see Nuremberg Germany for a day, but based on some of the feedback here maybe I will scrap trying to see Nuremberg and allow for 3.5 days in Prague.

when are you visiting?

I will be visiting in mid May. I fly out of Munich, so I thought it would maybe work well to train from Prague to Nuremberg and spend a day in Nuremberg before getting back to Munich to fly out. If 2.5 days in Prague is not enough, I would consider just passing on Nuremberg to give myself 3.5 days in Prague. I was interested in seeing the WWII Nazi sites in Nuremberg.

I will be in Prague in May 15-22nd,good time to be there and hopefully the weather will be a bit warmer than this past May.If you get a chance try and get to some of the lovely parks of Prague, Letna is easy to get to and has lovely views over the city,I am often to be found at the beer garden in Letna with a beer in hand.great place for a nice relaxing late afternoon drink (they do more than beer).
https://www.praguebeergarden.com/pubs/post/letna-beer-garden/

Prague is one of the cities we will be visiting in October. Is there some sort of situation in the Old Town to be aware of? Saw it mentioned by acraven above. Thank you :)

I think acraven was referring to the crowds in the Old Town ( I am willing to be corrected on that) , it can get really busy especially with all the narrow streets.October will not be as crowded as August but still busy .Prague is a year round destination especially for a short trip for many European travellers and now there is a huge number of folk from China and the far eastern countries ,though given the present problems with Corona Virus things may well have taken a steep decline in visitors from that area.

I would just go and enjoy what the city has to offer and it is easy enough to head down a side street and find a more quiet area.
I might be back in Prague in October ,I am taking early retirement at the end of September so a wee retirement party with a few friends might just be on the cards in the city.