From Vietnam to Guam
When travelling from Vietnam to Guam: Some of your Vietnam plug types fit in Guam (A, B). Bring a compact adapter for the others. Voltage is different (230V → 110V). Check your charger label; if it doesn’t list 110V you’ll also need a voltage converter. Frequency differs (50Hz → 60Hz). Modern phone and laptop chargers are usually fine, but some clocks, motors, and appliances may behave incorrectly.
Vietnam
GuamYour plugs
Type A
Fits
Type B
Fits
Type C
No fit
Accepted in Guam
Type A
Type B
2 of 3 plug type(s) match
You: A, B, C • Guam: A, B
No fit for: C
Voltage: 230V → 110V
Different voltage
You may need a voltage converter.
Frequency: 50Hz → 60Hz
Different frequency
Check device supports both 50/60 Hz.
You will need an adapter and likely a converterAdapters you may need
Your plug shape does not fully match. 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
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.