Metro
The metro is located right above terminal 3.
All the trains go in the same direction from the airport and the trains run with 4-6 minutes intervals during the day and evening. It will take you 13 minutes to get to Nørreport Station (Central Copenhagen) from the airport. Or 20 minutes to get to Frederiksberg St. close to the venue of the conference.
Tickets can be bought at the metro station and at the DSB ticket sales counter in terminal 3.
Train
The train station is located by terminal 3. You can take a free shuttle bus from terminal 1 to terminal 3, which will take 5 minutes.
The trains run every 10 minutes during the day and will get you to Copenhagen Central Station in about 20 minutes.
Tickets can be bought at the ticket machines in terminal 3 just above the railway, and at the DSB ticket sales counter, also located in terminal 3.
Taxi
Taxis can pick up passengers at terminal 1 and 3 and will get you to central Copenhagen in about 20 minutes depending on traffic.
Taxis are usually waiting outside each terminal.
It will cost approximately DKK 250-300.
http://www.rejseplanen.dk/