From South Korea to USA
When travelling from South Korea to USA: None of your South Korea plug types fit in USA. You will need a travel adapter. Voltage is different (220V → 120V). Check your charger label; if it doesn’t list 120V you’ll also need a voltage converter. Frequency is the same at 60Hz.
South Korea
USAYour plugs
Type F
No fit
Accepted in USA
Type A
Type B
0 of 1 plug type(s) match
You: F • USA: A, B
No fit for: F
Voltage: 220V → 120V
Different voltage
You may need a voltage converter.
Frequency: 60Hz → 60Hz
Same frequency
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).