Power adapters and voltage: plug types by country

>- There are two separate questions. The first is shape: does your plug fit the wall socket? The second is voltage: will your device survive the current coming out of it? A plug adapter solves the first. A voltage converter solves the second, and most travellers never need one.

>- Almost every phone, laptop, tablet, camera and power bank charger made in the last fifteen years is dual-voltage. The label on the brick reads something like "Input: 100–240 V, 50/60 Hz". If yours says that, you only need the right plug shape. If it says "120 V" or "230 V" alone, you need to think about voltage too.

>- So the practical rule: pack a plug adapter, check the small print on every charger, and leave the hair dryer at home unless it is dual-voltage.

>- Anyone crossing a border with a device that has a plug. That is most travellers, and the answer changes by where you are from and where you are going. A US traveller going to Europe needs a shape adapter; a UK traveller going to the US needs a different shape adapter; a US traveller going to Japan often needs nothing at all.

>- It matters most for people carrying high-wattage appliances: hair tools, kettles, CPAP machines, camera battery chargers, drone chargers, electric shavers and travel irons. It matters least for people travelling with a phone, a laptop and a USB charger.

>- If you are staying in one country, a single adapter is enough. If you are crossing several regions in one trip, a universal adapter or a small set of adapters is easier than buying one at each stop.

>- Step 1: list your devices. Separate them into low-wattage (phone, laptop, camera, tablet, power bank) and high-wattage (hair dryer, straightener, kettle, iron, CPAP).

>- Step 2: read the label. Look for "Input" on the charger or device. If it says 100–240 V (or 110–240 V), it is dual-voltage and needs only a plug adapter. If it names one voltage only, note it.

>- Step 3: find the destination plug type. Most countries use one of a small number of families: the two flat-pin North American type (A/B), the two round-pin European type (C/E/F), the three rectangular-pin UK type (G), the angled flat-pin Australian type (I), the round-pin Indian type (D/M) and the flat two-pin Japanese type (A). Many countries use more than one.

>- Step 4: match adapter to plug. Buy a single-country adapter if you are going to one place, or a universal adapter with sliding pins if you are crossing regions.

>- Step 5: decide about a converter. Only if you are bringing a single-voltage, high-wattage device. Buy a converter rated above the device's wattage — a 1200 W converter for a 1000 W hair dryer — and expect it to be heavy.

>- Step 6: pack a small power strip. One adapter plus a power strip lets you charge several devices from one socket, which matters in hotels with few outlets.

>- A single-country plug adapter is cheap: roughly US$5–15 in most airports, electronics shops and online stores (2026 estimate). A universal adapter with sliding pins runs about US$15–30 (2026 estimate). A small set of three or four regional adapters is often the best value for multi-region trips.

>- A step-down voltage converter is a different purchase. Expect US$25–60 for a unit rated 1000 W or more, and more for higher wattage (2026 estimate). It is heavy, it is one more thing to carry, and it is the reason many travellers simply buy a dual-voltage hair dryer at home instead.

>- Time: checking labels and looking up plug types takes about 20 minutes at home. Buying an adapter on arrival takes 10–30 minutes if you know where to go; airport shops charge more than city electronics shops (check).

>- Frequency is the quiet trap. Most of the world runs at 50 Hz, North America at 60 Hz. Dual-voltage electronics do not care. Simple motor devices and clocks can run fast or slow, and some appliances hum or overheat. If a device has a motor and no electronics, check the frequency rating (check).

>- Japan is the classic exception: 100 V, with 50 Hz in the east (Tokyo, Hokkaido) and 60 Hz in the west (Osaka, Kyoto, Kyushu). US and Canadian devices generally work; some run slightly underpowered. Devices from 230 V countries need a step-down converter (check).

>- Plug types vary by country and sometimes within a country. The main families are the two flat-pin North American type (A/B), the two round-pin European type (C/E/F), the three rectangular-pin UK type (G), the angled flat-pin Australian type (I), the round-pin Indian type (D/M) and the flat two-pin Japanese type (A). Check the exact match for your destination in the plug and voltage finder before you buy (check).

>- Cruise ships, older hotels and some campsites may have unusual sockets, shared outlets or no outlets near the bed. A short extension cord solves more problems than a bigger adapter.

>- Some countries have regions with different plug types, and some buildings have both. Do not assume one adapter covers a whole country (check).

>- The three options solve different problems, and mixing them up is the most common travel-tech mistake.

>- A plug adapter changes the shape of the plug. It does not change voltage. It is small, cheap and safe for any dual-voltage device.

>- A voltage converter changes the voltage. It is bulky, heavy, warm in use and only for single-voltage, high-wattage devices. It is not a substitute for a dual-voltage charger.

>- A dual-voltage device is the cleanest answer. Buying a 100–240 V hair dryer, shaver or kettle at home removes the need for a converter entirely and usually costs less than the converter.

>- The questions below cover the short answer, who this applies to, cost and time, and the traps that catch people out.