Guam power adapters - what plugs are used in Guam?

Guamanian power outlet

Summary

The type of power adapter, power converter or charger that you'll need to bring when visiting Guam all depend on the voltage and type of device that you're attempting to charge with a Guamanian power outlet. If you do not know which voltage your device uses then read the section on how can you tell if you have a single voltage or dual voltage device before going any further.

  • If your device can run on 110 volts or is dual voltage and your plug fits in a Guamanian power outlet then it should work in Guam without needing anything else.
  • If your device is 110 volts or is dual voltage but your plug doesn't fit in a Guamanian power outlet you'll need a suitable plug adapter for Guam such a Type B plug adapter [2]. Be aware that a plug adapter for Guam (or power adapter) is designed to change the shape of the plug on your device to fit into a plug outlet found in Guam, but but is unable to change the voltage from 110 volts to a different voltage.
  • If your device is unable to use 110 volts and isn't dual voltage you will also need a power converter for Guam to convert the voltage from 110 volts to the correct voltage for your device. You'll still need to bring a suitable plug adapter for Guam if your power converter doesn't have the correct Type B plug adapter.
  • If you simply need to power your USB devices such as a cell phone or a tablet then a USB travel power adapter will be more suited and it should work with any voltage, but make sure that you bring one which includes a Type B plug adapter otherwise you will also need to pack a suitable plug adapter for Guam.

Warning: If your device won't handle 110 volts you run a risk of an electrical fire hazard, a blown fuse or damage to your device. Prior to using your device in Guam read the instruction manual to ensure safe operation.

Background

Various voltages and sockets can all be confusing when planning to travel to a different country, especially for the first time traveller. With only a handful of different types of standards being used throughout the world this article tells you exactly what you'll need in advance to power your electronics in Guam. This page has links to useful instructions demonstrating exactly how to power your devices when you are in Guam using their Type B or A Guamanian 110 volt 60Hz wall outlets. You'll find power sockets differ regionally so please read the power adapters page for a complete list of countries. We recommend reading the Guam Wikipedia page [1] for more information.

Guam power adapters

Do I need a plug adapter for Guam?

It will depend on which country you are travelling from and the type of plug you are attempting to use. A US plug won't need an adapter as it can already fit into a Guamanian power outlet.

What is the best power adapter for Guam?

The best power adapter for Guam will be a Type B power adapter [2] which is suitable for powering any 110 volt appliance or device.

What is the best power adapter for Guam?

Guam power outlets

What plug sockets are used in Guam?

There are two different types of power supply used in Guam, these are type B and A with the primary power supply being type B:

  • Plug Type A - This unearthed wall supply, also known as a type A power outlet, can be identified by two slots next to each other for live and neutral.
  • Plug Type B - The power supply, also called a type B power outlet, is recognised by the two thin slots parallel to each other with a semicircular shaped hole below for the slightly longer ground pin.
What plug sockets are used in Guam?

What is the voltage in Guam?

The normal voltage in Guam is 110 volts.

What is the frequency used in Guam?

The frequency of the current used in a Guamanian power outlet is 60 Hz.

Is a Guamanian power outlet the same as the US?

An American plug will fit into power outlets used in Guam, the frequency and voltage range are both the identical to the US.

Is the voltage in Guam the same as in the US?

120 volts is used in America but the voltage from a Guamanian power outlet is 110 volts. Even though these are similar check the voltage on your US appliance or charger supports voltage fluctuations between 100-127 volts or that it can handle dual voltage.

Guam USB chargers

What is a USB travel power charger?

A USB travel charger is a dual voltage charger with interchangeable plugs and multiple USB ports, suitable for travelling abroad.

What USB charger do I need for Guam?

When travelling to multiple countries the best travel adapter for Guam to buy is a multiple USB port adapter which includes swappable plugs like a 4 port USB travel charger [5]. There are two types of wall outlets in Guam (B and A) and using a travel charger like this ensures that you are covered for type A.

As these types of chargers come with interchangeable plugs and handle 100 - 240 volts will mean that you can travel to over 100 countries in North America, Europe, Asia and Africa simply by switching the plugs over. If your model of device can support Fast Charge then you will benefit from faster recharging times by using one of these types of power chargers and additional compatibility with more power hungry devices. This means you can power more than one device at the same time without needing to bring multiple travel chargers or occupying additional power outlets. Only bringing a single lightweight USB travel charger will also keep the overall size and weight down, making it perfect to store in hand baggage while travelling. Because of their space saving versatility these types of power chargers can be used when you return home so when you're not on holiday they can sit under your bedside table charging multiple phones, tablets and speakers and using just a single plug socket.

For those travelling often we recommend searching for this type of versatile power charger online. The power charger illustrated here is the iKits 4 Port USB Wall Charger [5] which has been tested successfully for recharging multiple USB devices in numerous different countries.

What USB charger do I need for Guam?

Why use a travel USB charger for Guam?

  • Normal travel USB chargers include 4 or more USB charger ports, this means that you should only need to bring one charger to charge multiple devices. Rather than bring 4 individual power chargers it's now only necessary to pack one 4 port USB wall charger to power up to 4 separate devices which cuts down on the weight and size of your luggage.
  • Travel USB chargers include interchangeable plug heads for different regions. This is perfect when visiting other countries which are likely to use different power outlets to Guam.
  • A good charger is rugged, lightweight and compact; perfect for rigors of travel rather than risking bringing a domestic charger which could be impossible to repair or replace in Guam.
  • USB travel chargers can accept the 110 volt power outlets in Guam plus different voltage standards in other countries.
  • It is possible that some hotels in Guam only have a single wall outlet, by using a travel charger with multiple USB ports means you can share the single wall outlet with all your devices instead of waiting to charge each device one by one.
  • Because of their flexible nature they take the worry out of visiting any unknown country as they are guaranteed to work almost anywhere in the world.
  • Power outlets found in airports are often in short supply and demand for charging multiple devices from other passengers during departure can be high, therefore a USB travel charger with multiple ports and the capability to charge quickly is ideal.
  • Some countries power grids are unstable, a travel USB charger allows for unexpected surges to prevent damage to any devices connected to it. Trying to repair an overloaded smartphone in Guam might prove to be difficult and costly.
  • Premium USB chargers also feature power outlet strips to use multiple low wattage domestic appliances such as laptops, but please these are unsuitable for high wattage domestic such as hair dryers or clothes irons. See our section on using travel appliances in Guam for advice on the most suitable power adapter for a high wattage appliances in a Guamanian power outlet.
  • Some mobile phones could pull more than the standard 500 mA supplied by a normal 5 volt USB adapter to charge or provide fast charge. Ensure that the USB power adapter can support fast charging should any of your devices require additional power.
  • When returning home travel USB power chargers can also be useful by charging multiple cellphones and tablets every night using one power outlet.

What is the best USB charger for Guam?

The is the most compact option for travellers from any country who only have USB devices, but for visitors also wanting to use their domestic plugs these power converters provide larger but more versatile solutions. All 3 power adapters offer surge protection which can be useful for visitors of regions with unstable power grids to prevent damage to any connected devices from voltage spikes. These power adapters come with interchangeable type C, I and G plugs covering Europe, America, Australia, United Kingdom, Japan, China and over 150 destinations:

  • BESTEK Portable International Travel Voltage Converter - The BESTEK international travel converter has 4 USB charging ports with 3 AC power outlets and is the most popular portable power converter for travellers originating from America going to Guam using 3 pinned type B US plug sockets.
  • ORICO Traveling Outlet Surge Protector Power Strip - Likewise having 4 USB ports but only 2 AC power outlets the travel adapter from Orico is also aimed at travellers from North America using type B plugs. This is a more cost effective alternative to the BESTEK with only 1 less AC outlet at almost half the price.
  • BESTEK International USB Travel Power Strip - This power strip has 2 AC outlets but offers 5 USB charging ports. This versatile power strip is compatible with both American plugs and popular plug types A, D,E/F, G, H, I, L and N making it perfect for a majority of travellers from around the world visiting Guam.

Power converters for Guam

What is the difference between a power converter and a power adapter for Guam?

Voltage converter

What is the difference between a power converter and a power adapter for Guam?

A lightweight, cheap and small power adapter [6] (or plug adapter) changes the shape of the plug on your device to fit into a power outlet found in Guam, but a more expensive and heavier power converter [7] transforms a 110 volt Guamanian power outlet to work with a non-110 volt device.

Do I need a power converter for Guam?

When travelling to Guam from another country please make sure your device can be used with a 110v supply.

  • If your device slowly recharges or doesn't turn on when you are travelling to Guam from another region then check that it is compatible with a 110 volt power supply. Typically devices which originated from a different country which use a higher voltage (for example 240 volts) sometimes take longer to charge or won't turn on, check that the device is a dual voltage device (you'll find these are normally indicated by 100-240 volts) else you may need to use an additional International travel voltage converter [9] to ensure safe and proper use when powering devices.
  • For supplying power to larger appliances if you are visiting Guam from a higher 230 volt country you will need to use a much larger Step Up Voltage Converter [8] to convert the voltage from 230 volts to 110 volts.

Read the world power outlets page to find out which voltage your country uses.

What voltage is my appliance?

Single voltage hair dryer

What voltage is my appliance?

The best way to tell if your device is dual voltage is to look for either a sticker or numbers printed on the supplied charger or on the unit itself, typically on the rear or near to where the power cord goes. This location might vary depending on the make or model of your unit but could also be written on the box or in the instruction manual.

  • Single voltage devices might have a specific number - such as 240V.
  • Single voltage devices could also have a small voltage range (around 20 volts) with a dash to accomodate small voltage fluctuations - such as 100-120V.
  • Dual voltage devices will say a large voltage range separated with a slash - such as 100/240V.

Travel appliances that can connect to a Guamanian power outlet

Clothes iron
clothes iron

Curling iron
curling iron

Hair dryer
hair dryer

Hair straighteners
hair straighteners

Beats Pill speakers which can connect to a Guamanian power outlet

Beats Pill
Beats Pill

Beats Pill 2
Beats Pill 2

Jabra Bluetooth speakers which are compatible with a Guamanian power outlet

Jabra Solemate
Jabra Solemate

Jabra Solemate Mini
Jabra Solemate Mini

Mobile phones which work with the Guamanian power outlet

A mobile phone
mobile phone

Apple iPhones which can be connected to a Guamanian power outlet

iPhone
iPhone

iPhone 3G
iPhone 3G

iPhone 3GS
iPhone 3GS

iPhone 4
iPhone 4

iPhone 4S
iPhone 4S

iPhone 5
iPhone 5

iPhone 5C
iPhone 5C

iPhone 5S
iPhone 5S

iPhone 6
iPhone 6

iPhone 6 Plus
iPhone 6 Plus

Samsung Galaxy phones that can connect to a Guamanian power outlet

Samsung Galaxy S4
Samsung Galaxy S4

A list of Amazon Kindle tablets which can connect to a Guamanian power outlet

Kindle Fire 1st generation
Kindle Fire 1st generation

Kindle Fire 2nd generation
Kindle Fire 2nd generation

Kindle Fire HD 3rd generation
Kindle Fire HD 3rd generation

Kindle Fire HD 6 4th generation
Kindle Fire HD 6 4th generation

Kindle Fire HD 7 2nd generation
Kindle Fire HD 7 2nd generation

Kindle Fire HD 7 4th generation
Kindle Fire HD 7 4th generation

Kindle Fire HD 8.9 2nd generation
Kindle Fire HD 8.9 2nd generation

Kindle Fire HD Kids Edition tablet 4th generation
Kindle Fire HD Kids Edition tablet 4th generation

Kindle Fire HDX 3rd generation
Kindle Fire HDX 3rd generation

Kindle Fire HDX 8.9 3rd generation
Kindle Fire HDX 8.9 3rd generation

Kindle Fire HDX 8.9 4th generation
Kindle Fire HDX 8.9 4th generation

A list of Apple iPads which are compatible with a Guamanian power outlet

iPad
iPad

iPad 2
iPad 2

iPad 3
iPad 3

iPad 4
iPad 4

iPad Air
iPad Air

iPad Air 2
iPad Air 2

iPad Mini
iPad Mini

iPad Mini 2
iPad Mini 2

iPad Mini 4
iPad Mini 4

  1. https://en.wikipedia.org/wiki/Guam - Guam country Wiki page.
  2. Type B plug adapter - Allows appliances to connect to Type B power outlets without converting voltage.
  3. http://www.iec.ch/worldplugs/ - International Electrotechnical Commission World Plugs
  4. https://en.wikipedia.org/wiki/Mains_electricity_by_country - WikiPedia - Mains electricity by country
  5. IKits 4 Port USB Wall Charger - A universal USB charger capable of charging up to 4 USB devices with swappable international adapters.
  6. https://www.amazon.com/Ceptics-GP-12PK-International-Worldwide-Universal/dp/B01DJEBLQU/ref=as_li_ss_tl?_encoding=UTF8&psc=1&refRID=CFDDSXZJ59CH648AVQ0H&linkCode=ll1&tag=wikiconnections-20&linkId=b865b6ca5e535d710bf1e1b3a790f622 - power adapter
  7. Power converter - A step up step down power converter transformer converts 110-120 volts up to 220-240 volts and 220-240 volts down to 110-120 Volts.
  8. https://www.amazon.com/gp/search/ref=as_li_ss_tl?ie=UTF8&bbn=10967761&camp=1789&creative=390957&fst=as%3Aoff&linkCode=ur2&qid=1451325551&rh=n%3A172282%2Cn%3A!493964%2Cn%3A281407%2Cn%3A173541%2Cn%3A10967761%2Cp_n_feature_keywords_browse-bin%3A2888021011&tag=wikiconnections-20&linkId=HWUDRS5BKFQ75ACA - Step Up Voltage Converter
  9. International travel voltage converter - Travel voltage converters change the voltage of an electrical power supply by stepping up or stepping down the voltage and are often compact units which support both plug sockets and USB charging.