United Kingdom to Tonga Plug Adapter
Adapter needed
Yes. Tonga uses Type I sockets, and none of the plugs from the United Kingdom (Type G) fit, so you need a travel adapter.
Voltage converter
No. Both use the same voltage range (230 V and 240 V).
Frequently asked questions
Do I need a plug adapter for Tonga from the United Kingdom?
Yes. Tonga uses Type I sockets, and none of the plugs from the United Kingdom (Type G) fit, so you need a travel adapter.
Do I need a voltage converter for Tonga?
No. Both use the same voltage range (230 V and 240 V).
Source: Wikidata (CC0), retrieved 2026-10-22. Plug descriptions and compatibility are our own summary of the IEC plug types. Hotels and new buildings may have other sockets — carry a universal adapter if unsure.