Plug adapters / Thailand
Type A / B / C / O · 230 V · 50 Hz
Do I need a plug adapter for Thailand?
No. Thailand uses type A, B, C and O sockets, the same shapes as the United States, so your plugs fit as they are. The supply is 230 V at 50 Hz, higher than the US 120 V.
- 1Socket Type A / B / C / O
- 2Voltage 230 V
- 3Frequency 50 Hz
- 4US plug fits as is
What to pack for Thailand
Nothing extra for the sockets. Check the voltage, though: Thailand supplies 230 V through the same type A, B, C and O sockets you know from home, so a device that fits is not necessarily safe. Chargers marked 100–240 V are fine; a single-voltage appliance is not.
WorldStandards notes that type O outlets exist mostly on paper and that type E/F plugs fit the hybrid sockets without being earthed.
About type A, B, C and O sockets
Thailand's official standards are type C and type O, an earthed plug with two round pins and a round earth pin. In practice nearly every socket sold is a hybrid that also takes US type A and B plugs, which is why your plug fits, but WorldStandards notes that A and B compatibility is to be phased out in the long term. The catch is the supply: 230 V, so the plug fitting says nothing about whether the device survives.
Voltage and frequency in Thailand: 230 V, 50 Hz
Thailand runs on 230 V, nearly double the 120 V of a US outlet. Any device with "INPUT: 100–240 V" on its label, which includes nearly every phone, tablet, laptop and camera charger, adjusts automatically and needs only the plug shape sorted out. A device marked 120 V only will draw too much current and can burn out in seconds; that mostly means hair dryers, straighteners, kettles and some older electric shavers. A travel converter can run them, but a converter rated for a 1,500 W hair dryer is heavy, so a dual-voltage model is the usual answer. The 50 Hz frequency matters even less than the voltage: chargers and electronics ignore it, and only old clocks and some motors notice.
Same sockets elsewhere
Mexico, Canada, Italy, France, Dominican Republic and Spain use at least one of the same socket types as Thailand, so one adapter covers a trip that includes them.
- Mexico: type A/B, 127 V
- Canada: type A/B, 120 V
- Italy: type C/F/L, 230 V
- France: type C/E, 230 V
- Dominican Republic: type A/B, 120 V
- Spain: type C/F, 230 V
Data for the same trip
While you are packing: how much mobile data a week in Thailand needs, and which eSIM plans cover it.
Frequently asked questions
What plug type does Thailand use?
Thailand uses type A, B, C and O sockets. US type A and B plugs fit without an adapter.
What voltage is Thailand?
Thailand supplies 230 V at 50 Hz. Chargers marked 100–240 V handle it; single-voltage 120 V appliances do not.
Do I need a voltage converter for Thailand?
Not for phones, laptops or cameras, whose chargers accept 100–240 V. Only a single-voltage appliance such as a 120 V hair dryer needs a converter, and a dual-voltage model is the easier fix.
Will my phone charger work in Thailand?
Yes, provided it is marked 100–240 V, which almost every phone charger is. No adapter is needed because the sockets take US plugs.
Socket type, voltage and frequency: WorldStandards.eu country page, cross-checked 2026-10-21 against the Mains electricity by country table. The IEC retired its World Plugs guide in 2026.