Types C, F and K, 230 V, 50 Hz – those are the basics for electricity in Denmark. A converter can stay at home; Denmark supplies 230 V.
Handy for multi-stop trips: the Faroe Islands use the same plug types. Watch out when moving on: the Isle of Man, Ireland and Gibraltar use a completely different system. 2 of the 50 destinations in Europe share the plug types of Denmark.
Protective earth
Grounded and ungrounded sockets may occur
Denmark has sockets with a protective earth (Types F and K) and without (Type C). A plug that fits mechanically does not guarantee earthing.