The table below summarises the plug types, voltage and frequency of electrical current in both Samoa and Tonga.
| Samoa | Tonga | |
|---|---|---|
| Plug Types | I | I |
| Voltage | 230V | 240V |
| Frequency of electrical current | 50Hz | 50Hz |
Samoa uses Plug Type I.
No adaptor needed
Tonga uses Socket Type I, which is the same as the plug type of your appliances from Samoa. You will not need an adaptor.
The voltages found in Samoa (230V) and Tonga (240V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Samoa and Tonga is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.