Can I use my United States plug in Thailand?
A straight answer for United States devices on a Thailand trip — plugs, voltage and frequency compared.
Your plug fits — check the voltage
The plug shape fits, but the voltage does not: the United States runs at 120 V and Thailand at 220 V. A travel adapter only changes the shape, so check your device label — if it says 100–240 V you are fine, otherwise you need a voltage converter.
Side by side
| United States | Thailand | |
|---|---|---|
| Plug types | Type A and Type B | Type A, Type B, Type C and Type O |
| Voltage | 120 V | 220 V |
| Frequency | 60 Hz | 50 Hz |
| Socket standard | NEMA 1-15, NEMA 5-15, NEMA 14-30, NEMA 14-50 | TISS 166-2549 |
What to pack
- Your Type A and Type B plugs fit Thailand sockets — but the voltage does not.
- A converter (not just an adapter) for any device that is not marked 100–240 V.
- Nothing extra for frequency: chargers and laptops are unaffected, though mains clocks and older motors can run fast or slow.
- A second adapter if you travel with a partner — they are cheap and easy to lose.
Both countries in detail
United States power plugs
Type A, Type B at 120 V / 60 Hz.
Thailand power plugs
Type A, Type B, Type C, Type O at 220 V / 50 Hz.