Thailand's electrical setup is straightforward for most visitors, with only a few specific things worth checking before you pack chargers and adapters.
Voltage and plug types
Thailand runs on 220-240V, and sockets commonly accept both the two-pin round (Type C) and flat (Type A) plug styles, covering most European, UK (with an adapter), Australian and North American devices without much trouble in newer hotels — older buildings can be less consistent, so a universal adapter is a safe default to pack regardless.
What doesn't need converting
Phone chargers, laptop chargers and most modern electronics are dual-voltage by design (check the small print on the charger itself for "100-240V") — these only need a plug shape adapter, not a voltage converter.
What might need an actual converter
Older single-voltage appliances (hair dryers, straighteners bought before dual-voltage became standard) genuinely need a step-down converter, not just an adapter — worth checking your specific device rather than assuming a plug adapter alone is enough.
Buying an adapter locally
Universal adapters are widely available at Phuket's malls and convenience stores if you forget one — no need to treat it as a pre-trip essential you can't source there.