The currency in Denmark is Danish Kroner (DKK). One krone is divided into 100 Øre.
If you are carrying more than EUR 10,000, when travelling in or out of Denmark, you have to declare it to SKAT. This applies regardless of whether you travel to and from another EU member state or a non-EU member state.
Most places accept Euros, while some accept American Dollars, Norwegian- and Swedish Kroner, but please note that the exchange rate is not to your benefit.
Please note that the 1000 DKK bank note is no longer in use from May 2025. Read more about this here.