Thailand plug type and voltage: charging on the road
Flat pins, round pins, 220 volts, and the power bank rules for the flight.
By the Local SIM Thailand team, checked October 2, 2026
The short answer
Thailand runs on 220 volts at 50 hertz. Its sockets come in two kinds: hybrid sockets that take flat type A and B pins and round type C and F pins, and the newer type O socket, the official Thai standard, which takes round pins. A phone or laptop charger rated 100 to 240 volts works as it is; only the plug shape may need an adapter.
- Voltage: 220 volts at 50 Hz; the Bangkok electricity authority gives household single-phase supply as 220 to 230 volts.
- Sockets: flat type A and B pins, round type C and F pins; the Thai standard is the three-round-pin type O.
- Chargers: the 100 to 240 volt kind need an adapter, not a converter.
- Power banks: cabin bag only, at the standard limit of 100 Wh unless the airline approves more.
Checked October 2, 2026
Your plug and what to pack
UK and Ireland
- Your plug
- Three rectangular pins
- For Thailand
- An adapter is needed
Europe (EU)
- Your plug
- Two round pins
- For Thailand
- A slim type C plug usually fits; an adapter helps for larger earthed plugs
US and Canada
- Your plug
- Two flat pins
- For Thailand
- Usually fits the hybrid sockets; an adapter for type O sockets
Australia and New Zealand
- Your plug
- Two angled flat pins
- For Thailand
- An adapter is needed
Good to know (Packing)
Power banks in the air
Power banks travel in the cabin bag only, and a bag checked at the gate must give them up: they stay with you in the cabin. The standard limit is 100 Wh, larger ones need the airline's approval, and airlines can set stricter rules.
Single-voltage devices
Hair dryers and other devices built for 110 to 120 volts need a converter, not just a plug adapter. If the label shows one voltage only, leave it at home.
The type O standard
Older rooms mostly have hybrid sockets that take both flat and round pins; newer ones use the Thai type O socket, which takes a type C plug.
The bottom line
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Buy on VietSIMQuestions
What is the Thailand plug type?
Thai sockets take flat type A and B pins and round type C and F pins; the official standard is the three-round-pin type O, which takes a type C plug. UK and Australian plugs need an adapter.
Do I need a voltage converter in Thailand?
Not for a phone or laptop charger rated 100 to 240 volts; Thai mains is 220 volts, and those chargers handle it. Devices built for 110 to 120 volts, such as some hair dryers, need a converter.
Can I bring a power bank to Thailand?
Yes, in the cabin bag only. The standard limit is 100 Wh, larger batteries need the airline's approval before the flight, and airlines can set stricter limits of their own.
Sources
Where the facts on this page come from.
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