PlugVoltage

United Kingdom to United States Power Adapter Guide

United Kingdom runs 230⁠V and United States runs 120⁠V. You need a Type A/B plug adapter; check each input label before connecting; a converter is not suitable for every appliance.

Caution: United Kingdom runs 230V and United States runs 120V. A plug adapter changes the shape, not the voltage — a mismatched appliance must not be connected directly. High-power heating appliances should be replaced with a suitable local model; check both manufacturers before considering a converter.

United Kingdom (230⁠V) vs United States (120⁠V) at a glance

SpecUnited KingdomUnited States
Voltage230⁠V120⁠V
Frequency50⁠Hz60⁠Hz
Plug typesType GType A/B

Your United Kingdom devices in United States

Hair Dryer No MacBook Pro Charger (USB-C Power Adapter) Adapter Only CPAP Machine Check Label iPhone Charger Adapter Only
Next step

What to do next

Check one device in United StatesUse your exact device label for United States, not just the route average.Build a United States trip packSave several devices, adapter needs, and converter/no-go warnings together.Adapter vs converterAvoid the common mistake: plug shape does not change voltage.

The adapter we recommend

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Get a United Kingdom→United States adapter(opens in new tab)

Safety check: a plug adapter only changes plug shape. It does not convert voltage, so confirm your device label before buying.

Shopping links never change the safety verdict.

FAQ

Do United Kingdom plugs work in United States?

No — United Kingdom Type G plugs don't fit United States Type A/B sockets. You need a plug adapter.

Will my United Kingdom hair dryer work in United States?

For the typical United Kingdom single-voltage model: do not use it on this supply or buy a travel converter as a workaround. Choose a local-voltage model or a travel model explicitly rated for this supply. United States is 120⁠V. Confirm frequency and any voltage selector before connecting.

Is the voltage different between United Kingdom and United States?

United Kingdom is 230V and United States is 120V. That difference matters for single-voltage devices.

Power outlets in United States · Adapter vs converter

Guidance only — not professional electrical advice. Always confirm against your device's label before plugging in. Local wiring (especially in hotels and older buildings) can vary.