In Helsinki, they use Type C and F plugs and sockets. The mains voltage is 230 V, and the frequency is 50 Hz.
So, you’ll definitely need a travel adaptor in Helsinki. Their plugs and sockets aren’t the same as our Type G back in the UK.
Key Takeaways
- Plugs and sockets: C and F
- Mains voltage: 230 V
- Frequency: 50 Hz
- Travel adaptor needed? Yes, you do need a travel adaptor
- Voltage converter needed? No, a power converter won’t be required here.
- Recommended travel adaptor: AUNNO Universal Travel Adaptor
The details you see are backed by local authority advice on electricity, international standards (IEC), and first-hand accounts from seasoned travellers.
Recommended Travel Adaptor for Helsinki
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Recommended Travel Plug Adaptor
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Abroad with no adaptor? You’ll find some for sale at airports and in town. Just bear in mind they’re often overpriced and not the best quality.
Helsinki is often part of a trip that also includes Estonia and Sweden. Worth a quick look at those pages — plug systems are similar, but not always identical.
Sockets in Helsinki
In Helsinki, you’ll find Type C and F plugs and sockets.
Type C

Type C sockets have two round pins and no grounding. Unlike Type G, they take a slimmer plug without an earth pin or fuse.
Type F

Type F sockets have two round pins with two earth clips on the side. UK Type G plugs do not fit into Type F sockets.
Do You Need a Voltage Converter?
Converters only matter when voltages clash. In Helsinki the supply is pretty much the same as the UK’s, so you’re sorted.
Have a look at your device’s voltage label before plugging in abroad. If it says ‘100–240 V, 50/60 Hz’, there’s no need for a converter — laptops, tablets and other modern gadgets usually have this built in.
Top Travel Essentials to Take With You
It’s not just your adaptor that matters when you’re abroad. A digital luggage scale keeps check-in drama at bay, a power bank gives you peace of mind on long journeys, and packing cubes make your suitcase far easier to manage. Once you’ve tried them, you’ll wonder how you coped before.