Atlas · Data study · Updated 2026-07-18

Where US Travelers Need an Adapter (and Where 230V Can Fry Your Devices), 2026

We checked all 199 countries against the US standard: Type A/B plugs at 120V. The result: a plug adapter is needed almost everywhere, and in most countries the voltage is high enough to fry a single-voltage US device if you're not careful.

152/199 countries use a plug shape the US doesn't, so you'll need an adapter (76%)

171 countries run at 200V+, enough to destroy a single-voltage device

26 countries where a US plug needs nothing at all

Two separate checks, from a US traveller's point of view

Two things can go wrong at the wall

The plug shape and the voltage are independent problems. Most of the world fails you on both.

Will your US plug even fit the socket?

76%

24%

Needs an adapter · 152 countries use a different plug shapeFits as-is · 47 share a US Type A/B plug

And is the voltage safe for a single-voltage device?

86%

14%

200V+ risk · 171 countries can fry a non dual-voltage device100–127V, safe · 28 run near US voltage

The two checks are independent. A country can share your plug shape and still run dangerous voltage.

Shares a US plug AND runs at 100–127V

The short list: where a US plug just works

Only 26 of 199 countries let a US traveller plug in with no adapter and no converter. Nearly all of them are in the Americas or the Pacific.

BahamasBarbadosBelizeCanadaColombiaCosta RicaCubaDominican RepublicEcuadorEl SalvadorGuatemalaHaitiHondurasJamaicaJapanLiberiaMarshall IslandsMexicoMicronesiaNicaraguaPalauPanamaTaiwanTrinidad and TobagoUnited StatesVenezuela

A plug adapter changes the shape so your plug fits the wall. A voltage converter changes the electricity itself. Coming from the US you'll need an adapter in 76% of countries, but the bigger risk is voltage: in the 171 countries running 200V+, a single-voltage device (many hair dryers, straighteners, older electronics) can be destroyed instantly by an adapter alone. Modern phone and laptop chargers are almost always dual-voltage (look for "100–240V" printed on the brick) and only need the adapter.

Look up your destination →

Methodology & source

Each country compared to the US home standard: Type A/B plugs at ~120V. “Needs an adapter” = the country shares no plug type with the US. “Voltage risk” = primary voltage of 200V+, which can damage single-voltage (non dual-voltage) high-wattage devices. “Just works” = shares a US plug type AND runs at 100–127V.

Data: Wikipedia: Mains electricity by country (CC BY-SA 4.0). Analysis by Quick Travel Tools.

Cite this study (free with a link back):
Quick Travel Tools: “Where US Travelers Need an Adapter (and Where 230V Can Fry Your Devices), 2026”. https://quicktraveltools.com/studies/us-travel-adapter-guide-2026/