US household supply is commonly described as nominal 120V. A 220V-only appliance needs more than a shape adapter. Check the appliance label before buying a converter.
The key check
US household supply is commonly described as nominal 120V. A 220V-only appliance needs more than a shape adapter. Check the appliance label before buying a converter.
| Destination | Voltage | Frequency | Plug reference |
|---|---|---|---|
| United States | 120V | 60Hz | Type A, Type B |
What changes the answer
People still say ‘110V’ informally, but a travel decision should use the actual product's rated input range and the nominal supply described by current references. Do not assume that a 220V-only dryer will run acceptably at a lower voltage; the result may be poor performance or overheating under conditions the manufacturer did not approve.
Example: one US appliance across these stops
Suppose a charger is actually labeled INPUT 100–240V 50/60Hz. Its voltage and frequency fields include the displayed 120V candidates, but you still need a verified plug route, earth if required and sufficient AC rating. A 120V-only appliance cannot be cleared from this comparison for every listed stop without an outlet check. This is an illustrative label comparison, not a tested product recommendation.
Use this before plugging in
- Find the AC INPUT label on the exact appliance or power brick. Write down the stated voltage and frequency range.
- Confirm the actual destination outlet voltage and socket variant; a country reference cannot tell you what a particular room has.
- Trace the physical plug and protective earth through each adapter. Read the lowest AC current rating in the chain.
- If a condition is missing or the maker excludes the appliance, leave the setup unconnected and seek a rated alternative.
Common shortcut to avoid
A familiar plug shape or a broad USB wattage claim is not a substitute for AC voltage, grounding and load checks. The distinctions in the table above are screening data; they do not certify a particular hotel outlet or product.
Use the device checker · United States profile
Questions travelers still ask
Can a 100–240V 50/60Hz charger use these nominal supplies?
Those AC input numbers cover the displayed 120V and frequency references, but the wall plug, earth path and current rating remain separate checks.
Will one adapter head cover all these stops?
Not from the country lists alone. The observed plug families include Types A, B; ask each property which exact sockets are installed.
What about a 120V-only appliance?
Do not clear it automatically for these stops. Compare its exact label with the supply at the specific outlet and seek maker guidance if they differ.
Sources and scope
U.S. Department of Energy , Bel Fuse , Electrical Safety First . Research reviewed 2026-11-01; no outlet measurement or hands-on product test. Send a correction