No, you cannot use Danish kroner (DKK) directly in the Netherlands. The Netherlands uses the euro (EUR) as its sole legal tender.
1 DKK ≈ 0.134 EUR (or 1 EUR ≈ 7.46 DKK) — *rate fluctuates daily; check ECB or your bank.
Denmark is an EU member but opted out of the eurozone (1992 Edinburgh Agreement, confirmed by 2000 referendum). It retains the krone, pegged to the euro via ERM II (fluctuation band ±2.25%).
Use a no-foreign-transaction-fee credit card (e.g., Revolut, Wise, certain bank cards) for purchases in the Netherlands—get near-interbank rates without cash hassle.