From Thailand to USA
When travelling from Thailand to USA: Some of your Thailand plug types fit in USA (A, B). Bring a compact adapter for the others. Voltage is different (230V → 120V). Check your charger label; if it doesn’t list 120V 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.
Thailand
USAYour plugs
Type A
Fits
Type B
Fits
Type C
No fit
Type O
No fit
Accepted in USA
Type A
Type B
2 of 4 plug type(s) match
You: A, B, C, O • USA: A, B
No fit for: C, O
Voltage: 230V → 120V
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 USA
United States uses 120V/60Hz with Type A/B sockets.
Grid & history
Large, regionally managed grid built during the 20th century; increasingly mixed with gas, wind and solar.
Availability
Very reliable in cities; rural areas vary during storms.
Sockets & hotels
Two flat blades (Type A) and grounded (Type B).