From United States to Guam
All plugs match
When travelling from United States to Guam: Good news: all your United States 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.
United States
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.