Quick answer: South Korea uses 220 volts, 60 hertz and outlets with two round holes, commonly compatible with Type C and Type F plugs. Most modern phone and laptop chargers only need a plug adapter if their label says Input 100–240V, 50/60Hz. A single-voltage 110–120V appliance may need a real voltage converter—or should stay home.
The label matters more than the plug shape
A universal adapter can make almost any plug fit, which creates false confidence. It changes metal geometry, not the voltage entering a hair dryer, straightener, or charger. The small input label is the only reliable starting point.
Travelers often inspect a phone charger carefully and then overlook the higher-wattage heat appliance. Reverse that priority: the device that becomes hot is the one that deserves the strictest voltage and wattage check.
Adapter and converter are not the same
How to read the label
- “Input: 100–240V ~ 50/60Hz”: normally dual-voltage; use the correct plug adapter.
- “Input: 220–240V”: designed for Korea's voltage range, but still check the plug.
- “Input: 110V” or “120V” only: do not plug it directly into a Korean outlet.
The output line—such as 5V, 9V, or USB-C power delivery—describes what the charger sends to the device. For wall compatibility, the input line is the key.
Type C vs. Type F in Korea
Both use two round pins. Type C is the slim ungrounded “Europlug,” while Type F is a larger grounded plug often called Schuko. Many Korean outlets physically accept both, but loose universal adapters can sag or lose contact. Choose a solid, safety-certified adapter that fits firmly rather than stacking multiple cheap adapters.
Be careful with heat appliances
Hair dryers, curling irons, straighteners, electric shavers, and heating tools deserve extra attention because they can draw high wattage. A small travel converter may not safely support them even when it changes voltage. Dual-voltage markings, the appliance switch position, plug grounding, and converter wattage all matter. Using the hotel's dryer is often the simplest option.
What to pack
- One quality Type C/F-compatible adapter per traveler
- A dual-voltage multi-port USB charger
- Short charging cables labeled for each device
- A small power bank in carry-on luggage, following airline battery rules
- A photo of every charger's input label
If you forgot an adapter
VISITKOREA notes that adapters may be borrowed or purchased through hotel front desks, airports, retail stores, duty-free shops, and convenience stores. Availability and quality vary, so ask before opening packaging and avoid forcing a plug that does not fit.
Hotel safety checks
- Inspect the outlet and adapter for looseness, heat damage, or discoloration.
- Do not overload one outlet with several high-power devices.
- Keep chargers uncovered and away from bedding.
- Unplug equipment that becomes unusually hot, smells, sparks, or buzzes.
- Use the hotel's instructions for bathroom shaver sockets; they may have special limits.
Keep your phone online with the Korea eSIM vs. SIM guide and our eSIM no-data troubleshooting checklist. If you arrive late, also save the Seoul last-train guide.
Frequently asked questions
Can I charge an iPhone in Korea?
Most genuine modern phone chargers accept 100–240V, but verify the input label. You may only need a Type C/F plug adapter.
Can I use a US hair dryer with an adapter?
Not if it is 110–120V only. A plug adapter does not reduce Korea's 220V supply.
Is Korea the same as Japan?
No. Korea generally uses 220V and round-pin outlets; Japan generally uses lower voltage and flat-pin outlets. Do not reuse an adapter plan without checking.
Official source
Updated July 31, 2026. Electrical labels and hotel installations vary; follow the device manufacturer and property instructions.