The official currency of Denmark is the Krone, but sometimes the Euro is accepted. You can trade in Euros for Krones. read more
The fee you will be charged would probably equal the cost you would have for either exchanging money to DKK, or paying in Euro. However, if you want to change EUR to DKK, I advise you to use Forex (best rates, no or low fees), or any regular bank, including Danske Bank and Nordea at the airport. read more
Denmark uses the krone as its currency and does not use the euro, having negotiated the right to opt-out from participation under the Maastricht Treaty of 1992. In 2000, the government held a referendum on introducing the euro, which was defeated with 46.8% voting yes and 53.2% voting no. read more