About Power Plug Guide
Power Plug Guide is a free reference for travellers. It covers the plug shapes, voltage and frequency used in 199 countries, and tells you whether you'll need an adapter or voltage converter when travelling between them.
Who maintains this site
Power Plug Guide is an independent site. We don't sell adapters and we have no relationship with adapter manufacturers. The site is funded entirely by Amazon affiliate links — see below for details.
How the data is built
For each country we record the plug shapes used in domestic wall sockets, the mains voltage, and the frequency. Where a country uses more than one voltage or plug shape, we list all of them rather than picking a single primary type — older buildings and rural areas often still use older sockets that travellers will encounter.
The adapter and voltage-converter advice is generated from that data. Voltages are treated as compatible when they're within ±20 V of each other, and plug shapes when at least one shape is shared between the two countries. This is the same rule most travel adapter manufacturers use.
Data sources
Plug, voltage and frequency data is drawn from publicly available references, including:
- IEC World Plugs — the International Electrotechnical Commission's plug-and-socket reference
- Mains electricity by country on Wikipedia, cross-referenced against national standards
- AC power plugs and sockets on Wikipedia, for the Type A–O classification
- Government travel advisories and embassy pages where available
For countries where voltage varies by region (e.g. Brazil, Saudi Arabia), or where older infrastructure may differ from the modern standard, it's worth checking with your hotel or the local grid operator before you travel.
Affiliate links
When the site recommends an adapter or charger, the link points to Amazon and includes our Amazon Associates tag. If you buy through one of those links we earn a small commission at no extra cost to you, and that's what keeps the site free.
Errors and feedback
If you spot a mistake, get in touch and we'll fix it. Suggestions for missing countries, additional territories, or improvements to the compatibility logic are also welcome.