Do I need a power plug adapter for Guam?

Yes, traveling to Guam requires a power plug adapter. Guam uses Type A & B electrical outlets, which may not be compatible with your device plugs. We recommend purchasing universal adapters that support Type A & B plugs.

Do I need a voltage converter for Guam?

Guam's standard voltage is 110V with 60Hz frequency. If your device is labeled "100-240V 50/60Hz", you only need a plug adapter. If the device only supports single voltage (like 110V or 220V devices), you'll need a voltage converter to protect your device from damage.

What should I be aware of when using power adapters in Guam?

When using power adapters, please note: 1) Check adapters and devices for damage before use; 2) Avoid use in humid environments; 3) Don't overload outlets; 4) Choose safety-certified adapters; 5) Immediately disconnect power if devices overheat or behave abnormally. Choose reputable brand adapters for better safety and reliability.

Guam Voltage and Power Plug Guide - Electrical Standards

Guam Standard Voltage

110V

Alternating Current (AC)

Guam Power Frequency

60Hz

Standard

Guam Electrical Socket Types

Type A Power Plug Type B Power Plug

Multiple Standards Supported

Will my power plugs work in Guam?

Guam uses Type A、B electrical outlets with standard voltage of 110V and 60Hz frequency.

If your device plugs don't match Guam's standards, we recommend purchasing suitable travel adapters in advance to ensure proper use.

What power plug types are used in Guam?

Type A Power Plug

2 flat parallel pins

Plug type A is commonly used in North America and Japan. It has two flat parallel pins and no grounding pin. It is designed for 100-127V systems.

Type B Power Plug

2 flat parallel pins + 1 grounding pin

Plug type B is similar to type A but with an added grounding pin. It is commonly used in North America and Japan for 100-127V systems, offering higher safety.

Do you need a voltage converter for Guam?

Guam's voltage standards may differ from your device requirements.For devices not supporting wide voltage ranges, we recommend using dedicated voltage converters to protect your device safety.

If you need to address both plug adaptation and voltage conversion, consider combination converter adapters to solve both problems at once.

Electrical Device Compatibility Guide for Guam

Guam's standard voltage is 110V, with a frequency of 60Hz. The commonly used plug types are A and B. Typically, devices from countries with different voltages will require a voltage converter, and a plug adapter may be necessary. The main mobile network operator is DOCOMO PACIFIC, which supports 4G and 5G networks, making it useful for visitors.

Safety Reminders for Using Electrical Devices in Guam

⚠️ Important Reminder:In Guam, the voltage is 110V with a frequency of 60Hz. Ensure your devices are compatible with this voltage to avoid damage or safety hazards. Use type A or B plugs; if your device has a different plug type, make sure to have an adapter ready. In case of emergencies, call 911 for assistance.

Power preparation guide for traveling to Guam

Guam operates on a voltage of 110V and a frequency of 60Hz. Ensure your electronic devices are compatible with this standard. If your devices do not support 110V, bring a voltage converter or adapter. The common plug types are A and B, so check your device's plug type and prepare the necessary plug adapter. To avoid damaging your appliances, do not connect incompatible devices directly.

Additional Notes：Guam operates on a voltage of 110V and a frequency of 60Hz, with plug types A and B. Before traveling to Guam, ensure that your electronic devices can operate on 110V. If your devices only work on 220V, you will need a voltage converter. It is also advisable to bring an adapter to use local outlets. The power sockets in Guam are the same as those in the United States, so if you are coming from a country that uses the same plug types, you can use your devices directly. If you plan to stay in Guam for an extended period, consider purchasing a local power strip for charging multiple devices at once.

Frequently Asked Questions

Do I need a power plug adapter for Guam?
Yes, traveling to Guam requires a power plug adapter. Guam uses Type A、B electrical outlets, which may not be compatible with your device plugs. We recommend purchasing universal adapters that support Type A、B plugs.

View Travel Adapters on Amazon
Do I need a voltage converter for Guam?
Guam's standard voltage is 110V with 60Hz frequency. If your device is labeled "100-240V 50/60Hz", you only need a plug adapter. If the device only supports single voltage (like 110V or 220V devices), you'll need a voltage converter to protect your device from damage.

View Voltage Converters on Amazon
Which devices need voltage converters in Guam?
The following devices typically need voltage converters: hair dryers, straighteners, irons, some small appliances. The following devices typically only need plug adapters: phone chargers, laptops, tablets, camera chargers, electric toothbrush chargers. Check the voltage range on device labels before use. If you need to address both plug adaptation and voltage conversion, consider purchasing combination converters.

View Combination Converters on Amazon
What should I be aware of when using power adapters in Guam?
When using power adapters, please note: 1) Check adapters and devices for damage before use; 2) Avoid use in humid environments; 3) Don't overload outlets; 4) Choose safety-certified adapters; 5) Immediately disconnect power if devices overheat or behave abnormally. Choose reputable brand adapters for better safety and reliability.
Where can I buy power adapters for Guam?
You can purchase from: 1) Online before departure for convenience and variety; 2) Airport duty-free or electronics stores; 3) Local electronics stores, convenience stores, or supermarkets in Guam. We recommend preparing adapters before traveling to avoid search hassles after arrival. Choose universal adapters supporting multiple country standards for better practicality.
What are dual voltage devices? How to identify them?
Dual voltage devices can work under different voltage standards, typically labeled "100-240V" or "110-240V". Identification method: Check labels on device power adapters or chargers - if showing voltage range (like 100-240V), it's dual voltage and only needs plug adapters in Guam. If showing only single voltage (like 220V), you'll need voltage converters.

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Guam Voltage Standards and Power Plug Types