Which European countries still use their own currency instead of the Euro?

I'm planning a backpacking trip across Europe next year and trying to figure out my finances. While I know most of the EU uses the Euro, I keep getting confused about which countries opted out or haven't joined yet. Can anyone give me a comprehensive list of European nations that still rely exclusively on their own national currencies? Also, do these places still widely accept Euros for tourism, or should I exchange cash ahead of time?

The countries in the EU that still use their own currencies are Denmark, Sweden, Poland, Czechia, Hungary, Romania, and Bulgaria. Non-EU countries like the UK, Switzerland, Norway, and Iceland also use their own currencies.

Don't forget that if you are planning to rent a car to explore outside major cities, you'll definitely want to check out some helpful driving tips for Europe to make border crossings smoother.

In places like Switzerland and Norway, you can pretty much pay for everything with a credit or debit card. I rarely touched physical cash when I visited.

Poland and the Czech Republic are amazing for backpackers because your money goes so much further there compared to Western Europe!

While some touristy shops in places like Prague or Budapest might accept Euros, they usually give you a terrible exchange rate. It is always better to pay in the local currency or just use a card with no foreign transaction fees.

If you find yourself near the German border in Poland, some border shops might take Euros as change, but don't rely on it everywhere.

Sweden is almost completely cashless now. Many places won't even accept paper money, let alone foreign currencies like the Euro.

If your backpacking route takes you through some incredible historical areas, you might want to look into these must-see European castles that make great weekend stops.

Just get a travel debit card like Wise or Revolut. It automatically converts your money at the best rates and saves you the hassle of exchanging a bunch of different cash currencies beforehand.