Guam: Plugs & Sockets - Do I need a travel adapter to charge my devices from Japan?
✅ You don't need a travel adapter.
⚠️ You might need a voltage converter.
⚠️ Be extra careful because of the difference in frequency.
Country
Voltage
100
110
Frequency
50
60
Plugs & Sockets
❌
✔
Adapter needed
- - 100 – 127 V
- 15 A
- 2 pins
- Not grounded
- Compatible with sockets Type A and B
A
❌
✔
Adapter needed
- - 100 – 127 V
- 15 A
- 3 pins
- Grounded
- Compatible with sockets Type B
B
- - 100 – 127 V
- 15 A
- 2 pins
- Not grounded
- Compatible with plugs Type A
A
- - 100 – 127 V
- 15 A
- 3 pins
- Grounded
- Compatible with plugs Type A and B
B
You need
FAQ
What power sockets are used in Guam?
Guam uses sockets (=outlets) Type A and B. Plug Type A is rated for 100-127V and 15A, featuring two pins and is ungrounded. Plug Type B is rated for 100-127V and 15A, featuring three pins and is grounded.
What power plugs are used in Japan?
Japan uses sockets (=outlets) Type A and B. Plug Type A is rated for 100-127V and 15A, featuring two pins and is ungrounded.. Plug Type B is rated for 100-127V and 15A, featuring three pins and is grounded.
Are plugs from Japan and Guam the same?
All of your plugs from Japan should be compatible with sockets from Guam.
Do I need a plug adapter in Guam?
All of the plugs that are used in Japan should be compatible with generally available in Guam.
What kind of travel adapter do I need for Guam?
You should be able to use plugs from Japan without a travel adapter in Guam.
Will my phone charge in Guam?
You should be able to charge your phone without a travel adapter in Guam. However, it's always a good idea to check the specifications on your device’s charger to confirm compatibility, or consider purchasing a universal travel adapter if you're unsure.
Will my laptop charge in Guam?
You should be able to charge your phone without a travel adapter in Guam. However, it's always a good idea to check the specifications on your device’s charger to confirm compatibility, or consider purchasing a universal travel adapter if you're unsure.
What is the voltage in Japan vs Guam?
The standard voltage in Guam is 110 V, whereas in Japan the voltage supply is 100 V.
Can I use 100 V in Guam?
The standard voltage in Guam is 110 V, whereas in Japan the voltage supply is 100 V. This means that the electrical voltage requirements for devices are more or less the same. Therefore you should be able to use all of your electronic devices when traveling between Guam and Japan.
What is the frequency in Japan vs Guam?
The standard frequency in Guam is 60 Hz, whereas in Japan the fequency supply is 50 Hz.
Can I use 50 Hz in Guam?
Generally, most modern chargers for devices like laptops, smartphones, and tablets are designed to work with a range of power frequencies from about 45 Hz to 65 Hz. However, for devices that rely on specific timing based on the mains frequency—such as clocks, some medical equipment, and certain audio devices—the correct frequency is crucial. Using these devices with an incorrect frequency can also cause unexpected behavior. Always check your device's specifications for sensitivity to voltage and frequency variations before using it in a different country or with an unverified power source.
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