Corridor Reference • United Kingdom to United States
Using British Electronics in the United States
You will need a Type A or grounded Type B adapter to plug UK three-pin plugs into American two- or three-pin sockets. The US electrical grid operates at 120V at 60Hz, compared to the UK's 230V at 50Hz.
Direct Verdict for Travelers
You will need a Type A or grounded Type B adapter to plug UK three-pin plugs into American two- or three-pin sockets. The US electrical grid operates at 120V at 60Hz, compared to the UK's 230V at 50Hz.
Electrical Specification
United Kingdom (Source)
United States (Destination)
Traveler Impact
Nominal Grid Voltage
230 Volts
120 Volts
Voltage Mismatch (Step-down required for heating tools)
Grid Frequency
50 Hz
60 Hz
AC motors run at altered speed; digital chargers unaffected.
Standard Plug Types
Type G
Type A, B
Mechanical plug adapter strictly required.
Visual Pin & Socket Comparison
United Kingdom Plugs
Type G
United States Wall Outlets
Type A
Type B
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Key Electrical Gotchas in United States
If you plug a British 230V appliance (like an electric kettle or hair dryer) into an American 120V socket, it will receive half the expected voltage. It will not blow up, but it will only deliver roughly 25% of its rated thermal power, meaning it will barely get lukewarm.
American Type A sockets are often polarized: the neutral slot (left) is slightly wider than the hot slot (right). High-quality travel adapters accommodate this design.
Device Category Breakdown
Smartphones, Tablets & Laptops
Charges normally with any UK-to-US plug adapter. Phone chargers are universal 100-240V.
Hair Dryers, Straighteners & Heated Tools
British hair dryers and styling wands will not reach operating temperature unless they are explicitly dual-voltage (120V/230V switchable).
Shavers & Personal Grooming
Shavers with 100-240V switches will charge normally.