The 6 Plug Types That Cover 90 Percent of the World

You bought the 14-piece adapter kit before your first big trip, the one with a see-through case and a slot for every letter from A to N. Eight of those slots have never touched a socket. Six shapes cover almost everywhere you're likely to go, and once you know which six, the rest of that kit is just weight in your bag.

Why Six Beats Fourteen

The IEC lists fourteen plug types because fourteen groups of countries wired their grids before anyone agreed on a shape. Most of those letters were never really separate problems, though. Type C, the two thin round pins used across continental Europe, fits into type E, F, H, J, K, L and N sockets too, since those countries built their walls to accept the older shape alongside their own newer one.

That single overlap folds seven of the fourteen letters into one adapter. Type B works the same trick with type A: a US-style plug slides straight into a Canadian, Mexican or Japanese type B socket, no extra part required. Strip out every letter that's really a subset of something bigger and six genuinely different pin shapes remain. For the letter-by-letter version of who fits into what, see every plug type from A to N.

Type C, E and F: Continental Europe and Far Beyond

Type C is the two-pin Europlug, and it's the shape you'll reach for most once you leave North America. It's rated for low current, but it physically seats in the German and Austrian Schuko socket (type F), the French socket (type E), and a long list of others across Asia and South America. Digital nomads bouncing between Lisbon, Tbilisi and Bangkok often go months on one type C adapter, the routine we cover in our digital nomad power kit. If a wall socket in Europe or much of Asia looks unfamiliar, there's a decent chance a plain type C plug still fits.

Type G: The UK and Its Old Trading Posts

Type G is the bulky three-rectangular-pin plug from the UK and Ireland, and it followed the British Empire's trade routes more than its borders. You'll need it in Malta, Singapore, Hong Kong, Malaysia and most of the Gulf states. It's also the heaviest and most awkward shape on this list, since every type G plug carries its own built-in fuse. That makes it safer, not smaller, so budget the extra suitcase space.

Type A and B: North America, Japan and Central America

Type A is the flat two-pin plug from the US, Canada and Mexico. Type B adds a round ground pin and is standard in those same three countries, and Japan runs a close variant of type A. A type A device works fine in a type B socket, so one adapter shape covers the whole cluster: the US, Canada, Mexico, much of Central America and Japan. It's the plug most American travelers already own, molded onto nearly every charger they packed.

Type I: Australia, New Zealand and Argentina

Type I has two flat pins angled into a V, with a third pin straight down on grounded versions. It's standard in Australia, New Zealand and Argentina, and China runs a similar-looking variant on its own grid. Don't assume the two are interchangeable. The angle and spacing differ enough that a plug built for one can sit loose, or refuse to seat, in a socket built for the other.

Type D: India, Nepal and Sri Lanka

Type D is three thick round pins set in a triangle, and it belongs to South Asia: India, Nepal, Sri Lanka and Bangladesh. It won't take a type C plug the way most of Europe's sockets will, which is why travelers used to easy trips through Europe and Southeast Asia still get caught out here. If India is on the itinerary, pack a dedicated adapter for it rather than hoping something else in your bag forces its way in.

Type M: Southern Africa's Oversized Triangle

Type M looks like an enlarged type D: three thick round pins in a wider triangle, running South Africa, Namibia, Botswana, Lesotho and Eswatini. Like type D, it won't accept a type C plug, and the pins sit too far apart for some compact universal adapters to grip properly. Cheap all-in-one adapters are the ones most likely to fail here, so check that reviews mention southern Africa specifically before trusting one.

Where the Six-Type Method Breaks Down

Six shapes won't get you everywhere. Israel's type H, with its wide-spread round pins, doesn't reliably accept anything else, and forcing a type C plug into one is a good way to bend pins or lose the ground connection. Full-power appliance sockets in Italy and Switzerland also need their own larger fittings, separate from the slim adapter that handles a phone charger fine in the same country.

The bigger limit is that these six clusters don't talk to each other. A UK type G plug never fits an Australian type I socket or a US type A socket, and the reverse is just as true. Cross from London to Sydney to Los Angeles on one trip and you're still carrying three separate shapes, no matter how you group the other eleven letters.

Six dedicated adapters solve the shape problem, but a single universal adapter often solves it more simply. A universal travel adapter folds several of these pin shapes into one housing, at the cost of extra bulk. If you're shopping for one, our guide on choosing a universal travel adapter covers the certification and wattage details that separate a safe unit from one that runs hot in a hotel wall. For years of travel across all six clusters, dedicated adapters still win on durability. For most trips, one good universal adapter beats a drawer full of them.

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