Thailand runs on 220V electricity at 50Hz—and if you're coming from the US, your plugs won't fit without an adapter.
TL;DR: The OREI US-18 3-Pack is the best Thailand travel adapter for most travelers—compact, reliable, lifetime warranty, and under $13 for three. If you need USB charging, grab the Ceptics PAK KIT instead.
Quick primer on plug types: Thailand uses Type O outlets (three round pins in a triangle). Your US plugs are Type A (2-prong) or Type B (3-prong). Type A sometimes fits loosely in Thai outlets, but Type B won't fit at all. That's why you need an adapter.
The voltage is 220V—double what US outlets provide—but most modern electronics (phones, laptops, cameras) are dual-voltage and work fine with just an adapter.
Quick Picks
| Rank | Product | Best For | Link |
|---|---|---|---|
| 🥇 | OREI US-18 3-Pack | Best Overall | Check Price |
| 🥈 | TESSAN Universal 28W | Multi-Country Travel | Check Price |
| 🥉 | Ceptics PAK KIT 20W | USB-C Charging | Check Price |
| 4 | Thailand Adapter 4FT | Extension Cord | Check Price |
Why Trust This Guide?
While we didn't test every adapter in Bangkok ourselves, we analyzed real-world feedback from verified owners across Reddit communities and Amazon reviews to find patterns that single reviews miss.
Thailand Outlet Compatibility
| Plug Type | Works in Thailand? | Notes |
|---|---|---|
| Type A (US 2-prong) | ⚠️ Sometimes | Loose fit, not reliable |
| Type B (US 3-prong) | ❌ No | Needs adapter |
| Type C (Europlug) | ✅ Yes | Works in most outlets |
| Type O (Thailand) | ✅ Yes | Native, best fit |
Best For Your Situation
| Scenario | Best Pick | Why |
|---|---|---|
| 🎒 Backpacker | OREI US-18 | Compact, lifetime warranty |
| 🔌 Multiple Devices | Thailand 4FT Extension | 3 outlets + 4 USB ports |
| 🌏 Multi-Country Trip | TESSAN Universal | Works in 150+ countries |
| 📱 USB-C Fast Charging | Ceptics PAK KIT | 20W PD charging built-in |
| 💼 Business Traveler | OREI US-18 | Lifetime warranty, reliable |
The 4 Best Thailand Travel Plug Adapters
1. OREI US-18 3-Pack – Best Overall
The OREI US-18 is our top pick for Thailand travelers—a simple, compact adapter from a small business with a lifetime warranty.
Why It Works:
- 2x Type O + 1x Type C — The pack includes both Thailand-specific and European adapters, useful if your itinerary includes multiple countries
- CE certified — Meets European safety standards
- Lifetime warranty — OREI stands behind their products
The Catch: The Type C adapter in the pack is ungrounded, which matters if you're using devices that require a ground connection (rare for most travel electronics, but worth noting).
Who Should Skip This: If you need USB charging built into your adapter, look at the Ceptics PAK KIT instead.
Best For: Travelers who appreciate the peace of mind of a lifetime warranty and might hop to Vietnam or Cambodia on the same trip. If you're also packing light, check our best underseat backpacks guide.
OREI US-18 Thailand Adapter 3-Pack
Check Latest Price2. TESSAN Universal Travel Adapter 28W – Best for Multi-Country Travel
The TESSAN Universal is for travelers who don't want to buy a different adapter for every country. One device covers 150+ countries including Thailand.
Why It Works:
- All-in-one design — Sliding prongs for Type A, C, G, and I outlets (covers US, Europe, UK, Australia, and yes, Thailand)
- 5 USB ports — 3 USB-C + 2 USB-A, with 28W total output
- Compact for what it does — Smaller than carrying 4 separate adapters
The Catch: It's bulkier than a simple Type O adapter. If Thailand is your only destination, this is overkill. Also, 28W split across 5 ports means slower charging if you're powering everything at once.
Who Should Skip This: Single-destination travelers. The OREI US-18 is smaller, cheaper, and does the job.
Best For: Digital nomads and frequent international travelers who want one adapter for their entire trip across multiple countries. Pairs well with a carry-on travel backpack for the ultimate one-bag setup.
TESSAN Universal Travel Adapter 28W
Check Latest Price3. Ceptics PAK KIT 20W – Best with USB Charging
The Ceptics PAK KIT combines a Type O adapter with built-in USB-C and USB-A ports—perfect if you want to minimize the number of things you're carrying.
Why It Works:
- 20W USB-C PD — Fast enough to charge an iPhone at full speed
- 4-in-1 design — Two US outlet inputs plus USB-C and USB-A ports
- Swadapt system — The adapter head is interchangeable if you buy other Ceptics attachments for different countries
The Catch: At 20W, you're not fast-charging a MacBook. This is phone and tablet territory. For laptop charging, you'll still want a dedicated GaN charger.
Who Should Skip This: Travelers who already carry a multi-port USB charger. You'd be duplicating functionality.
Best For: Travelers who want to consolidate their charging setup into fewer pieces.
Ceptics PAK KIT 20W Type O
Check Latest Price4. Thailand Power Adapter with 4FT Extension – Best with Extension Cord
Sometimes the outlet is behind the nightstand, under the desk, or in some other inconvenient spot. This adapter solves that problem with a 4-foot extension cord built in.
Why It Works:
- 3 US outlets + 4 USB ports — Charge everything from one adapter
- 4-foot cord — Reach outlets that would otherwise require furniture rearrangement
- 24W USB output — 2 USB-C + 2 USB-A ports
The Catch: It's the bulkiest option on this list. Not ideal for ultralight packers or those who move hotels frequently.
Who Should Skip This: Backpackers and minimalist travelers. The cord adds weight and bulk.
Best For: Travelers staying in one place for a while, or anyone who's been burned by inconveniently placed hotel outlets before.
Thailand Power Adapter with 4FT Extension
Check Latest PriceDo You Need a Voltage Converter?
Probably not. Quick test:
- Look at your device's power brick or charging label
- Find the "Input" specification
- If it says 100-240V, you only need an adapter
- If it says 120V only, you need a converter
Devices that typically need only an adapter:
- Phones and tablets
- Laptops
- Camera chargers
- Electric toothbrushes
- CPAP machines (most modern ones)
Devices that often need a converter:
- Hair dryers and curling irons (unless dual-voltage)
- Some older electronics
- Certain medical devices
Quick note: Voltage converters are bulky, expensive, and often unreliable. If you need a hair dryer in Thailand, it's usually easier to buy a cheap one there or use the hotel's.
Thailand Electrical Quick Facts
| Specification | Thailand | USA |
|---|---|---|
| Voltage | 220V | 120V |
| Frequency | 50Hz | 60Hz |
| Primary Plug | Type O | Type A/B |
| Also Accepts | Type A, B, C, F | — |
Frequently Asked Questions
What type of plug adapter do I need for Thailand?
Thailand primarily uses Type O outlets, though you may also encounter Type A, B, and C. For most US travelers, a Type O adapter is essential. The good news is that Type A plugs (standard US 2-prong) often fit in Thai outlets, but a proper adapter ensures a secure connection.
Do I need a voltage converter for Thailand?
Most modern electronics like phones, laptops, and camera chargers are dual-voltage (100-240V) and only need a plug adapter. Check your device's power brick—if it says 100-240V, you're good with just an adapter. Hair dryers and curling irons often need a converter.
Can I use my US plugs directly in Thailand?
Sometimes. Thai outlets often accept US 2-prong plugs, but the fit can be loose and unreliable. A proper Type O adapter ensures a secure connection and is worth the small investment for peace of mind.
How many adapters should I bring to Thailand?
We recommend at least 2-3 adapters. Hotel rooms often have limited outlets, and having spares means you can charge multiple devices or have a backup if one gets lost. The 3-packs from Ceptics or OREI are perfect for this.
What's the difference between Type O and Type C adapters?
Type O is Thailand's official standard with three round pins in a triangular pattern. Type C (Europlug) has two round pins and also works in many Thai outlets. Some adapter packs include both for maximum compatibility.