World Power Plugs & Sockets

The Ultimate Guide for International Travelers

Whether you are packing for a business trip to London or a vacation in Tokyo, one question always arises: “Will my power plug fit?” Using the wrong adapter or plugging a device into the wrong voltage can damage your electronics. This guide covers all 15 power plug types (Type A through Type O), including technical specifications, voltage compatibility, and a country-by-country reference to keep your devices powered safely.

Quick Check: Voltage vs. Frequency

Before looking at the shapes, check your device’s power label.

Single Voltage: Devices labeled 110V or 230V only. You will need a Voltage Converter if the country differs.
Dual Voltage: Devices labeled 100-240V. These are travel-friendly (like most phone chargers and laptops). You only need a Plug Adapter.

The World Power Plug Directory

Type A (North American 2-Pin)

Used in USA, Canada, Mexico, Japan.
Two flat parallel pins. The Japanese version is usually unpolarized (both pins are the same size).
Works with Type A sockets.

Type B (North American 3-Pin)

Used in USA, Canada, Mexico.
Two flat parallel pins and a round grounding pin.
Works with Type B sockets; Type A plugs can also fit into Type B sockets.

Type C (Europlug)

Used in most of Europe, South America, Asia.
Two round pins. It is the most widely used international plug.
Fits into Type E, F, J, K, L, and N sockets.

Type D (Old British 3-Pin)

Used in India, Pakistan, Sri Lanka, Nepal.
Three large round pins in a triangular pattern.
Works with Type D sockets.

Type E (French 2-Pin)

Used in France, Belgium, Poland, Slovakia, Czech Republic.
Two round pins and a hole for the socket’s male grounding pin.
Fits Type E and F sockets.

Type F (Schuko)

Used in Germany, Austria, Netherlands, Spain, Scandinavia.
Two round pins with two grounding clips on the side.
Fits Type E and F sockets.

Type G (British 3-Pin)

Used in UK, Ireland, Hong Kong, Singapore, Malaysia, UAE.
Three rectangular pins in a triangular pattern. Widely considered the safest plug in the world.
Works with Type G sockets only.

Type H (Israeli 3-Pin)

Used in Israel, Palestine.
Three round pins (older versions had flat pins) in a Y-shape.
Type C plugs can fit into Type H sockets.

Type I (Australian/Chinese 3-Pin)

Used in Australia, New Zealand, China, Argentina.
Two flat pins in a V-shape and a vertical grounding pin.
Works with Type I sockets.

Type J (Swiss 3-Pin)

Used in Switzerland, Liechtenstein.
Three round pins; the middle grounding pin is slightly offset.
Type C plugs are compatible with Type J sockets.

Type K (Danish 3-Pin)

Used in Denmark, Greenland.
Two round pins and a “smiley” semi-circular grounding pin.
Type C plugs fit into Type K sockets.

Type L (Italian 3-Pin)

Used in Italy, Chile, Ethiopia.
Three round pins in a straight line.
Type C plugs fit the smaller version of Type L sockets.

Type M (South African 3-Pin)

Used in South Africa, Namibia, Botswana.
Three large round pins (larger than Type D).
Used for larger appliances in countries that use Type D.

Type N (Brazilian 3-Pin)

Used in Brazil, South Africa.
Two round pins and a middle grounding pin (similar to Type J but different spacing).
Type C plugs fit into Type N sockets.

Type O (Thai 3-Pin)

Used in Thailand.
Two round pins and a grounding pin.
Designed specifically for Thailand; compatible with Type C plugs.

Global Voltage, Frequency & Plug Type Reference

This table provides a comprehensive overview of the electrical standards used in major travel destinations. Note that some countries use multiple plug types or dual voltages.

Region / Country	Common Plug Types	Standard Voltage	Frequency	Traveler’s Note
USA & Canada	A, B	120V	60Hz	Standard North American 3-prong.
United Kingdom	G	230V	50Hz	Uses the fused Type G “British Standard.”
Most of Europe (EU)	C, E, F	230V	50Hz	“Schuko” (Type F) is standard in Germany/Spain.
China	A, C, I	220V	50Hz	Most sockets accept two or three different types.
Japan	A, B	100V	50/60Hz	Unique 100V system. 50Hz in Tokyo, 60Hz in Osaka.
Australia & NZ	I	230V	50Hz	Sockets always have an individual on/off switch.
Brazil	N (and C)	127V / 220V	60Hz	Dual voltage. 127V is common; check your hotel!
India & Pakistan	C, D, M	230V	50Hz	Type D is the large “old British” standard.
South Africa	C, M, N	230V	50Hz	Type M is very common for heavy appliances.
South Korea	C, F	220V	60Hz	Uses the same round-pin plugs as Europe.
Thailand	A, B, C, O	220V	50Hz	Modern hotels use “Hybrid” sockets for A, B, and C.
Saudi Arabia	G, (A, B)	230V	60Hz	Standardized to Type G, but older buildings vary.
Mexico	A, B	127V	60Hz	Same plugs as USA, but voltage is slightly higher.
Switzerland	J (and C)	230V	50Hz	Type J is unique; Europlug (C) will fit.
Israel	H (and C)	230V	50Hz	Type H is unique; Europlug (C) will fit.

Guide to Worldwide AC Voltages and Frequencies

Frequently Asked Questions (FAQ)

Q: Can I use a Type C plug in a UK (Type G) socket?
A: No. You will need a specific Type G adapter. Never try to force a plug into a socket.

Q: Do I need a voltage converter for my iPhone?
A: No. Apple chargers are “Dual Voltage” ($100V-240V$) and only require a plug shape adapter.

Q: What is the difference between an adapter and a converter?
A: An adapter changes the shape of the pins. A converter changes the electricity (voltage) coming out of the wall.

Q: Can I use a 2-pin plug in a 3-pin socket?
A: Generally, yes. In many systems (like Type A into Type B, or Type C into Type J/L/N), the two power pins will fit, but you will lose the “grounding” protection. However, some sockets (like the UK’s Type G) have safety shutters that require the third pin to open the port.

Q: Why does my plug have one pin larger than the other?
A: This is called a polarized plug (common in Type A). It ensures the plug is inserted the correct way to reduce the risk of electric shock. If your travel adapter is not polarized, you may find it difficult to insert these plugs.

Q: Can I use a Europlug (Type C) in the UK?
A: No. While you might see people forcing them in using a pen to open the shutters, this is a fire hazard and can damage the socket. Always use a proper Type G adapter.

Q: What happens if I plug a 110V device into a 230V socket?
A: Without a voltage converter, the device will likely overheat, smoke, or even catch fire. At the very least, you will blow a fuse or fry the internal circuitry permanently.

Q: Can I use my hair dryer or hair straightener abroad?
A: These are high-wattage heat-producing devices and are the most common things travelers break. Most are not dual-voltage. Even with a cheap converter, they often fail. It is usually safer to buy a dual-voltage travel version or use the one provided by your hotel.

Q: Does the frequency (50Hz vs 60Hz) matter?
A: For most modern electronics (phones, laptops, cameras), no. However, for devices with motors or internal clocks (like older alarm clocks or some kitchen appliances), the wrong frequency can make them run at the wrong speed or keep time incorrectly.

Q: Is it better to buy individual adapters or a “Universal” one?
A: For frequent travelers, a Universal Adapter is convenient. However, for a single-country trip (like to London), a dedicated Type G adapter is often sturdier, safer, and provides a better connection for heavier plugs.

Q: Do I need an adapter if the hotel has USB ports in the wall?
A: USB ports are standardized worldwide ($5V$), so you don’t need a voltage converter. However, built-in wall ports often charge much slower than your original wall brick. Carrying your own adapter and plug is always recommended for “fast charging.”

Q: Are “All-in-One” adapters safe for laptops?
A: Yes, as long as they are grounded (3-prong). If your laptop plug has three pins, using a 2-pin universal adapter removes the safety ground, which can sometimes lead to a “tingling” sensation on metal laptops or static damage.

Q: What is a “Power Strip” trick for travelers?
A: A popular pro-tip: Bring one power strip from your home country and one high-quality travel adapter. Plug the power strip into the adapter; now you have 4–6 sockets from your home country available using only one wall outlet.

Q: Where is the best place to buy an adapter?
A: Buy it before you leave. Airport shops and hotel gift shops often charge 3x the price for lower-quality adapters.

Pro Traveler Tip

Always carry a Universal Travel Adapter. High-quality models usually cover Types A, C, G, and I, which will work in over 150 countries!