Guides
Questions about plugs and voltage, answered from the data on 139 countries. Every figure is computed from the same dataset as the country pages.
- The 15 plug types explainedPins, earthing, standards and how far each type reaches, in one table.
- 230 V vs 120 V countries: the count by regionWhich countries sit on each side of the voltage divide, and where 50 and 60 Hz break the pattern.
- Countries with several plug types, rankedFrom Jordan’s six socket types to the 20 countries that use only one.
- One plug for every country? The coverage numbersHow far each plug type reaches, and the smallest set that covers every country.
- When the plug fits but the voltage doesn’tThe seven destinations where a familiar socket hides a different voltage.
- How the adapter checker worksThe rules behind each answer, with worked examples.
Prefer a direct answer for one trip? Use the adapter checker.