PlugVoltage

United States to Thailand Power Adapter Guide

United States runs 120⁠V and Thailand runs 230⁠V. Your plug shape is compatible; check each input label before connecting; a converter is not suitable for every appliance.

Caution: United States runs 120V and Thailand runs 230V. A plug adapter changes the shape, not the voltage — a mismatched appliance must not be connected directly. High-power heating appliances should be replaced with a suitable local model; check both manufacturers before considering a converter.

United States (120⁠V) vs Thailand (230⁠V) at a glance

SpecUnited StatesThailand
Voltage120⁠V230⁠V
Frequency60⁠Hz50⁠Hz
Plug typesType A/BType A/B/C/O

Your United States devices in Thailand

Hair Dryer No MacBook Pro Charger (USB-C Power Adapter) Check Rating CPAP Machine Check Label iPhone Charger Check Rating
Next step

What to do next

Check one device in ThailandUse your exact device label for Thailand, not just the route average.Build a Thailand trip packSave several devices, adapter needs, and converter/no-go warnings together.Adapter vs converterAvoid the common mistake: plug shape does not change voltage.

The adapter we recommend

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Get a United States→Thailand adapter(opens in new tab)

Safety check: a plug adapter only changes plug shape. It does not convert voltage, so confirm your device label before buying.

Shopping links never change the safety verdict.

Best travel adapters for Thailand →

FAQ

Do United States plugs work in Thailand?

Often yes — the plug shapes are compatible. But check the voltage before plugging single-voltage devices in.

Will my United States hair dryer work in Thailand?

For the typical United States single-voltage model: do not use it on this supply or buy a travel converter as a workaround. Choose a local-voltage model or a travel model explicitly rated for this supply. Thailand is 230⁠V. Confirm frequency and any voltage selector before connecting.

Is the voltage different between United States and Thailand?

United States is 120V and Thailand is 230V. That difference matters for single-voltage devices.

Power outlets in Thailand · Adapter vs converter

Guidance only — not professional electrical advice. Always confirm against your device's label before plugging in. Local wiring (especially in hotels and older buildings) can vary.