Thailand Power Plug & Voltage Checker
Plug type, voltage, and 220V hazard by home country and device.
What this solves
Thailand uses 220V / 50Hz with plug types A, B, C, and O. Travelers from the US (110V) need adapters and possibly voltage converters. Hair dryers, curling irons, and CPAP machines often only run on 110V — plugging them into Thai power can fry them or cause fire. Phones and laptops usually accept 100–240V universal input.
How to read results
"Universal voltage" means the device accepts 100–240V — only an adapter is needed. "US-only voltage" means you also need a transformer — better to skip the device and buy local. The 220V hazard warning is critical for high-wattage appliances.
Limitations
- Check the label on your device's charger — "Input: 100–240V" means universal.
- Plug types B and A (US) are partially compatible with Thai sockets — Type O is the modern standard.
- Adapter quality varies — cheap ones can overheat.
FAQ
Will my phone charger work?
Yes — modern phone chargers accept 100–240V. You only need a plug adapter (~$5 from 7-Eleven).
Can I use my US hair dryer?
Risky. Most US hair dryers are 110V only. Plugging into 220V will burn out the motor or cause a fire. Buy a 220V model or borrow one at your hotel.
Will my CPAP work?
It depends. Modern ResMed/Philips CPAPs accept 100–240V — only an adapter is needed. Older or 12V-only models need a converter. Check your label.
Sources
- International Electrotechnical Commission — published plug type standard.
- Thai Industrial Standards Institute — TIS 166 plug spec.
- Device manufacturer labels — voltage input ratings.