In Guam, they use Type A and B power plugs and outlets. The voltage is 110V, and the frequency is 60Hz.
✅ Good news! You won’t need a travel adapter in Guam. Their plugs and outlets are the same as our standard Type A and B back in the States.
Quick Overview of the Plugs in Guam:
- Plug type in Guam: A and B
- Standard voltage: 110V
- Frequency: 60Hz
- Need a travel adapter? No, you don’t need a travel adapter
- Need a voltage converter? No, a voltage converter isn’t necessary
All details are checked against official power guidelines, IEC standards, and real-world input from travelers who’ve been there recently.
Travelers visiting Guam often continue their journey to Japan, the Philippines, or South Korea. These countries may use different plug types—worth checking before you go.
Power Outlets in Guam
In Guam, they use Type A and B power plugs and outlets.
Type A
Type A outlets have two flat prongs and no grounding pin.
Type B
Type B outlets have two flat prongs and a grounding pin. Type A plugs will also fit.
Top Travel Essentials to Pack
There’s more to smart packing than clothes and chargers. These tools make travel smoother and more stress-free.
Power Bank
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Do You Need a Voltage Converter?
Voltage converters are only required when the power supply is significantly different. In Guam, it’s pretty much the same as in the U.S., so no need to bring one.
Always verify the voltage rating on your device before packing it for a trip. If it reads “100-240V, 50/60 Hz”, it’s designed for international use and works with both 120V and 220-240V without needing a converter. Many phones, laptops, and rechargeable gadgets have this feature.
Which Travel Devices May Need a Converter?
Not sure if that 230-volt outlet will toast your laptop? Play it safe and trust this best-in-class converter; it’s the go-to safeguard for Americans visiting over 180 countries.
Device Need Converter? Notes Phone ❌ No Most modern phone chargers are dual voltage (100–240V) Laptop ❌ No Check the power brick label for 100–240V Hairdryer ❌ No (usually) High wattage; many models are not dual voltage Electric toothbrush ❌ No Most models are 110V only Camera / DSLR ❌ No (usually) Most chargers are dual voltage Power bank ❌ No Charges via USB, adapter is enough Electric shaver / trimmer ❌ No Older or cheaper models may not support 230V Tablet / iPad ❌ No All models are dual voltage Portable fan ❌ No Many models are compatible with 110V Game console ⚠️ Check voltage Newer consoles like PS5 and Xbox are often dual voltage — check to be sure Bluetooth speaker ❌ No Charges via USB E-reader (Kindle, etc.) ❌ No USB charging only, no converter needed
More About Guam
Guam is where American day starts—literally. It’s one of the first places in U.S. territory to greet the sunrise thanks to its location just west of the International Date Line. Even though it’s tiny (about 212 square miles), it packs in everything from rugged jungle trails to dramatic cliffs like Two Lovers Point.
You’ll find a big chunk of land is actually military bases, but that’s part of its unique feel—strategy and surf coexisting. UnderWater World Guam is one of the longest aquarium tunnels around, where you can walk under sharks and sea turtles. And if you go inland, Fena Lake sits behind a dam that looks like something out of an action movie—it’s off-limits but worth a drive-by for the views.
Guam uses the same plugs and outlets as Japan.