From Puerto Rico to Guam
All plugs match
When travelling from Puerto Rico to Guam: Good news: all your Puerto Rico plug types fit in Guam. Voltage is different (120V → 110V). Check your charger label; if it doesn’t list 110V you’ll also need a voltage converter. Frequency is the same at 60Hz.
Puerto Rico
GuamYour plugs
Type A
Fits
Type B
Fits
Accepted in Guam
Type A
Type B
2 of 2 plug type(s) match
You: A, B • Guam: A, B
Voltage: 120V → 110V
Different voltage
You may need a voltage converter.
Frequency: 60Hz → 60Hz
Same frequency
Plugs fit, but voltage differsAdapters you may need
Voltage differs; check for 100–240V support.
About electricity in Guam
Guam is 110V/60Hz with Type A and B sockets. US standard.
Grid & history
GPA supplies the island from a mix of oil-fired plants and growing solar.
Availability
Reliable.
Sockets & hotels
Standard North American sockets.
Energy mix
Renewables15%
Fossil85%
Practical tips
- US plugs fit local sockets directly, so US travellers do not need an adapter.
- Voltage is 110V, so US plugs and chargers are designed for it.
Frequently asked questions
- Will my Puerto Rico plug work in Guam?
- Yes. Every Puerto Rico plug type (Type A, Type B) fits in Guam sockets without an adapter.
- What plug type does Guam use?
- Guam uses Type A, Type B. The supply is 110V at 60Hz.
- Do I need a voltage converter for Guam when travelling from Puerto Rico?
- Guam runs on 110V, while Puerto Rico uses 120V. Check your charger label for a 100 to 240V rating; if it does not list 110V you will also need a voltage converter.
- Is the electrical frequency in Guam the same as Puerto Rico?
- Frequency in Guam is 60Hz, the same as Puerto Rico.