There are two separate questions and travelers routinely answer the wrong one. Will the plug fit the socket, and will the device survive the electricity coming out of it? A plug adapter answers the first. A voltage converter answers the second. Almost everyone needs the first and almost nobody needs the second, and the way to know which is you is printed on your own charger.
The short version
- Read the label on the charger. It is the authority for your device.
- "INPUT 100 to 240V" means dual voltage. You need only a plug adapter.
- A single narrow voltage means you need a converter, or a different device.
- Phones, laptops and cameras are almost always dual voltage.
- Hair dryers, straighteners and kettles usually are not. These are what fail.
What You Need to Know
The label is the answer
Every charger and power brick carries its input rating in small print. If it reads something like "INPUT: 100 to 240V ~ 50/60Hz", the device handles both of the world’s mains systems and every common frequency, and all you need is a physical adapter so the plug fits the socket. If it names one narrow range only, plugging it into the other system will either not work or will destroy it.
This is the only check worth making, and it is specific to your actual device rather than to a general table. It takes ten seconds per charger and it is the whole of this guide.
Adapter versus converter
- A plug adapter changes the shape of the pins. It does nothing to the electricity. It is small, cheap and what most travelers need.
- A voltage converter or transformer changes the electricity itself. It is heavier, more expensive, and needed only for single-voltage devices.
Buying an adapter when you needed a converter destroys the device. Buying a converter you did not need means carrying a brick for nothing.
The devices that actually cause trouble
High-heat appliances. Hair dryers, straighteners, curling irons, travel kettles and electric shavers are the common single-voltage items, and they are also the ones people most want to bring. The practical answer is usually to leave them at home and use what the accommodation provides, or to buy a dual-voltage travel version, which exists for most of them.
Plug shapes
Plug and socket types vary by country and there are more of them than people expect, including within a single region. A universal adapter covers most of them and is worth more than a country-specific one if you travel often. Confirm the type for your specific destination with a current source before departure rather than relying on memory.
What to Do Before Your Trip
- Read the input rating on every charger you plan to take.
- Leave single-voltage appliances at home unless you have a converter.
- Check the plug type for each country on the itinerary.
- Take one adapter per device, or a multi-port charger and one adapter.
- Pack a power bank, which needs no adapter at all in the field.
Traveling as a group? Adapters are the item groups always share and never have enough of. Name the plug type in advance and ask people to bring their own.
Explore group travel planningImportant Considerations
A multi-port USB charger plus one plug adapter is lighter and simpler than four adapters, and it is dual voltage almost without exception. For most travelers that combination plus a power bank is the whole electrical kit.
Grounding is worth a moment’s thought for laptops. Some cheap adapters have no ground pin, which can leave a metal-bodied laptop feeling faintly live to the touch and, more practically, can be a poor connection. An adapter that carries the ground through is worth the small extra.
Check what the accommodation actually provides. Many hotels supply a hair dryer, and several now have USB sockets built into the room, which removes the problem entirely. Where an itinerary includes remote lodges, ask about power hours: some run a generator for part of the day, which changes when you charge rather than how.
Tips for Group Travelers
- Name the plug type for each country in the pre-departure note.
- Ask everyone to bring their own adapter. Sharing one is a queue.
- Warn about hair dryers and straighteners specifically.
- Ask the accommodation what it provides.
- Carry two spare adapters as leader. Someone will forget.
Common Mistakes to Avoid
- Assuming an adapter changes the voltage. It does not.
- Bringing a single-voltage hair dryer.
- One adapter for a family.
- Buying a country-specific adapter for a multi-country trip.
- Never reading the label that answers the question.
Frequently Asked Questions
Do I need a voltage converter?
Read the charger’s label. If the input rating spans a wide range such as 100 to 240 volts, the device is dual voltage and you need only a plug adapter. If it names one narrow range, you need a converter or a different device. Phones, laptops and cameras are almost always dual voltage; hair dryers and straighteners often are not.
What is the difference between an adapter and a converter?
An adapter changes the shape of the plug so it fits the socket and does nothing to the electricity. A converter changes the electricity itself. Most travelers need only the adapter, and using one where a converter was required is how devices are destroyed.
Will my phone charger work anywhere?
Almost certainly, because phone and laptop chargers are made for worldwide sale and are dual voltage. Confirm it on the label rather than assuming, then bring the right plug adapter for each country you are visiting.
Should I buy a universal adapter?
If you travel to more than one region it usually pays for itself, since a country-specific adapter is useless on the next trip. Look for one that carries the ground connection through, which matters for metal-bodied laptops, and check it covers every country on your current itinerary.
Related Travel Tips
- Phones, technology and connectivity, the section this guide belongs to.
- International Travel Packing Checklist. Where the adapters go.
- Items That Should Not Go in Checked Luggage. Power banks in particular.
- Using Your Phone Internationally.
Plan Your Trip With LABUSA Travel
Plug types differ by country and power is not continuous everywhere. LABUSA Travel can tell you which sockets an itinerary meets and where the generator hours are.
Talk with a LABUSA Travel advisor about a trip you are considering, or browse our destination guides for a specific country.
Verify Before You Travel
The input rating printed on your own charger is the authority for that device, and it is the only source that is certainly correct for it. Confirm the plug type and any local electrical guidance for your destination with a current reference before departure, and see the U.S. Department of State country information page for anything the destination notes about electricity or equipment.
Travel requirements, health guidance and safety conditions can change. Always confirm current requirements with the appropriate government or official authority before departure.