You can see the KTH campus map (in PDF format, with a path from the subway exit to the venue on page 2), to help you navigate from key nearby points. You will see signs that guide you from the subway station to the venue beside the road.
The Flygbussarna company runs a coach service between the Arlanda airport and the Central Stockholm (T-centralen bus and metro station). The journey takes around 40-50 minutes and is one of the cheapest ways to and from the airport. Bus stops are just outside the airport terminals.
Price is around 120 SEK for one-way ticket. Check the Flygbussarna site for more information and online booking. There are machines at the terminals and you can also buy a ticket from information kiosk, once you are out of the luggage area.
Arlanda Express is a rail link connecting the Stockholm Central Station and the Stockholm-Arlanda Airport outside Stockholm, Sweden. The trip takes 20 minutes and runs four to six times per hour.
The price is around 280 SEK for a one-way ticket or 540 SEK for a round-trip ticket. Please check the Arlanda Express site for more information and online booking. There are machines at the terminals; you can also buy a ticket at the information kiosk, once you are out of the luggage area.
Taxis are just outside the terminals at the arrival level. Please do not be surprised if taxi drivers are 'aggressively' hailing you once you are out of the terminal doors. There is no protocol/queue and you can choose any taxi looks fine to you. There are fixed prices for a trip between Arlanda Airport and the city center, about 540 SEK. The price should be well marked on the vehicle. Overall, taxis are reliable. But if you needed help with a choice, these two companies could be picked for example:
To travel around Stockholm you can use buses or the underground railway (subway). You can use the same kind of tickets on both the buses and the subway. There are travel cards for 1 day (125 SEK), 3 days (250 SEK) or 7 days (325 SEK) to use in Stockholm. You can also buy a single ticket before boarding the bus or subway. You cannot purchase a ticket onboard the buses.
The Journey Planner (mobil.sl.se) could helps you find the quickest route between two addresses or stations. For more information about the public transportation in Stockholm, please visit SL Customer Services.