Power Plugs, Sockets & Voltage in Denmark, Sweden, Norway & Finland

Short answer: across Denmark, Sweden, Norway and Finland the electricity is 230 volts at 50Hz, and every socket takes the round two-pin Type C (Europlug) and Type F (Schuko) plugs. So one cheap "Europe" travel adapter works in all four countries. Your phone and laptop chargers will run fine on 230V as long as they say "100-240V" on the label, which nearly all of them do. The only people who need a bulky voltage converter are those bringing a single-voltage 110-120V appliance like a US hair dryer.

That's the whole thing in a paragraph. Below is the detail, the per-country quirks, and the mistakes that catch people out.

Voltage and frequency: identical across the region

All four Nordic countries use the European standard: 230V, 50Hz. This matters in two ways.

First, voltage. If you're coming from the US, Canada, Japan or parts of Latin America, your home runs on roughly 110-120V. Plugging a device built only for 120V into a 230V socket can fry it. Coming from the UK, Europe, Australia, New Zealand, most of Asia and Africa, you're already on 220-240V, so voltage is a non-issue.

Second, frequency. The Nordics run at 50Hz; North America runs at 60Hz. For chargers and electronics this difference is irrelevant. It only matters for old-fashioned devices with a mains motor or a clock that times off the frequency, which almost nobody travels with anymore.

Plug and socket types, country by country

The good news is that the plug you carry is the same everywhere here. Both Type C and Type F plugs fit every Nordic socket. The small differences are in the wall socket itself.

• Sweden, Norway, Finland — Wall sockets are Type F (Schuko): two round pins with earth clips on the sides. Type C Europlugs slot straight in too. There is genuinely nothing to think about; one Schuko/Europe adapter covers all three.
• Denmark — Sockets are officially Type K, which looks like a face with two round pins and a round earth pin below. Don't let this throw you. Type C Europlugs fit directly, and the round-pin chargers you'll actually use (phones, laptops) plug in without trouble. A standard "Europe" adapter is fine. One genuine quirk: a German-style Type F (Schuko) earthed plug pushes into a Danish socket but its side earth clips don't fully mate with the Danish earth pin. For two-pin chargers this is a non-issue; only large earthed appliances are affected, and those aren't things travellers carry. Newer Danish installations increasingly use Type E sockets that take Schuko fully, so you may see both.

In other words: pack one Europe/Schuko travel adapter and you're sorted from Copenhagen to the Arctic Circle.

What travellers from the US, UK and Australia need

Your home plug shape won't fit a Nordic socket, so you need a plug adapter. This is a passive piece of plastic that changes the pin shape. It does not change voltage.

• United States / Canada (Type A/B) — Flat parallel pins. You need a US-to-Europe adapter. Because the US is 120V, also confirm your devices are dual-voltage (see below). A simple adapter costs roughly €5-15 / approximately $6-18.
• United Kingdom / Ireland (Type G) — Three chunky rectangular pins. You need a UK-to-Europe adapter. The UK is already 230V, so no converter is ever needed, just the shape change.
• Australia / New Zealand (Type I) — Two angled flat pins. You need an Australia-to-Europe adapter. Australia is 230-240V, so again, no converter needed.

A single universal travel adapter that covers all input types and has built-in USB ports is the most convenient option, usually around €15-30 / approximately $18-35. Brands like Skross and similar are widely sold in airports and electronics shops.

Dual-voltage devices vs needing a converter

This is where people overspend on gear they don't need. The deciding factor is one line of tiny text on your charger or device.

• "INPUT: 100-240V, 50/60Hz" — Dual-voltage. Works anywhere in the world. You need only a plug adapter. This covers essentially all modern phone chargers, laptop bricks, tablet chargers, camera chargers and electric toothbrushes.
• "120V" or "110-120V" only — Single-voltage. Plugging this into a 230V Nordic socket without a voltage converter will likely destroy it (and can be a fire risk). This is mostly older or cheaper US hair dryers, straighteners, shavers and small heating gadgets.

For the vast majority of travellers and new arrivals, every device you own is dual-voltage and you need zero converters. The honest advice: leave the 120V-only hair tools at home and buy a cheap 230V one locally instead of lugging a heavy converter.

Charging phones and laptops: the realistic setup

• Phones — Your USB charger is dual-voltage. You only need the plug adapter to physically connect it to the wall. Bring your own USB-C / USB-A wall charger plus one Europe adapter.
• Laptops — The power brick is dual-voltage on every mainstream laptop (MacBook, Dell, Lenovo, HP, etc.). Plug adapter only. USB-C-charged laptops are easiest, since one cable and one charger handle everything.
• USB ports in the wild — Many newer Nordic hotels, the SJ and DSB trains, long-distance coaches, and the airports in Copenhagen (CPH), Stockholm Arlanda (ARN), Oslo (OSL) and Helsinki (HEL) now have USB-A or USB-C charging at seats and bedsides. Treat this as a bonus, not a guarantee. A small multi-port USB charger plus one adapter keeps you fully self-sufficient.

Common mistakes / what to watch

• Buying a voltage converter you don't need. Nine times out of ten the device is already dual-voltage. Check the label first; you'll almost always just need an adapter.
• Confusing an adapter with a converter. An adapter changes the plug shape. A converter changes the voltage. Putting a 120V-only hair dryer into a Europe adapter (with no converter) and switching it on at 230V will fry it.
• Bringing only one adapter. You'll want to charge a phone and a laptop and maybe a camera at once. Bring two adapters, or one adapter feeding a multi-port USB charger.
• Assuming the airport will have a free socket. It often does, but at peak times every outlet is taken. Carry a power bank as backup.
• Overthinking Denmark's Type K socket. Your phone and laptop chargers fit a standard Europe adapter without drama. The Type K earth-pin quirk only matters for large earthed appliances, which you won't be travelling with.
• Cheap no-name adapters. A poorly made adapter can sit loosely in the socket or overheat. Spend a few euros more on a reputable brand, especially if you'll leave a laptop charging overnight.

Next step

Before you fly, do one thing: pull out your phone charger and laptop brick right now and read the input voltage on the label. If it says 100-240V, you're done for the trip — just pack a single Europe/Schuko travel adapter (or a universal one with USB ports) and you can charge everything in Denmark, Sweden, Norway and Finland. For the rest of your arrival checklist, see our guide on what to pack when moving to Scandinavia.