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Thailand Plugs, outlets & travel adapters
Thailand uses Type A, B, C and O sockets. The mains supply is 230 V at 50 Hz.
Plugbert's take Thailand keeps it straightforward: Type A, B, C, O at 230 V.
Do you need a travel adapter for Thailand?
It depends on where your plugs come from.
🇺🇸 From the United States
Your plugs fit some compatible outlets in Thailand, but not every listed socket design. An adapter may be needed for the outlet you encounter. Check the actual outlet and preserve any grounding your device requires; hybrid connections may not be grounded.
Thailand uses 230 V, much higher than the 120 V in the United States. An input rating of "100–240V" covers the listed supply voltage; you still need a suitable plug or adapter. For single-voltage devices, follow the manufacturer's guidance on conversion; using a suitable local device may be simpler.
United States to Thailand in full🇬🇧 From the United Kingdom
You need a plug adapter. Plugs from the United Kingdom (Type G) don't fit the Type A, B, C and O sockets in Thailand. A Type A (US 2-pin) adapter fits 2 of the 4 listed socket families there. For grounded devices, get a Type B (US 3-pin) adapter for a compatible grounded outlet instead; it does not fit every listed outlet. Socket variants can differ; check the actual outlet and adapter rating.
No voltage converter needed. Both countries use 230 V.
United Kingdom to Thailand in fullFrom other countries
Somewhere else?
Sockets you'll find in Thailand
What to expect in Thailand
Several outlet designs, no promise of universal fit
Electrical Safety First lists A, B, C and O for Thailand. Tourism Thailand's 2019 advice describes outlets accepting flat parallel or round pins, with both two-pin and three-pin designs. Ask your accommodation which outlets are available for your equipment.
An ungrounded A or C charger may fit a compatible outlet directly. That does not establish compatibility with every outlet or provide grounding. Equipment requiring earth needs an appropriate grounded connection, such as Type O for an O outlet or B for a B outlet. Do not assume that a Schuko plug has a grounded connection merely because its round pins appear to fit.
The voltage is higher than in North America
We use Electrical Safety First's 230 V, 50 Hz figure. Tourism Thailand's older page says 220 V, 50 Hz. This discrepancy does not establish regional variation; if your device's rating narrowly depends on the exact supply, confirm locally before use.
An input label covering 100–240 V, 50/60 Hz includes either published figure. A 120 V-only US appliance must not be connected through a plain adapter, even where its pins fit. Read the input rating before packing it.
Why a universal adapter can still miss an outlet
Check the documented wall-side outputs: “universal” does not establish support for Thailand's Type O design or earth continuity. Verify the adapter's supported inputs and load limit too. A mixed-hole socket does not convert voltage. For several destinations, compare Japan and South Korea separately rather than assuming one Asian adapter covers the trip.
Will your devices work in Thailand?
Sockets in Thailand supply 230 V. Find the "input" line on each device or its charger. An input rating of "100–240V" covers the listed supply voltage; you still need a suitable plug or adapter. Check that the input frequency also covers 50 Hz. An adapter changes the plug shape, not the voltage or frequency. For switchable devices, follow the manufacturer's instructions before plugging in.
Often rated 100–240 V; confirm on the charger: phone charger, laptop charger, camera battery charger.
Check the label first: electric toothbrush, electric shaver, CPAP machine, hair straightener / curler.
Usually single voltage: hair dryer, kettle / coffee maker, anything with a heating element.