Like most of Europe, Hungary uses two-pronged outlets in the range of 220 to 240 volts.
Note that the voltage is twice what it is in the United States, so be careful not to plug in a device that’s not capable of handling the difference (we learned this the hard way with the printer we brought with us).
Most phone chargers, for example, will handle the 220 just fine (in the fine print on the device, it will say what range of input is OK). But other devices, such as printers, for example (see above) will not be able to handle the extra voltage. For that, you’d need a voltage converter, and those cost enough to offset the savings of bringing most electronic devices with you.
Before we arrived, we bought this super-cool color-coded adapter that works well in connecting our U.S. appliances to the walls here in Hungary. It has also come in handy during other trips, such as to London, where the power connections are different. This adapter is usable in most places worldwide, and it’s great for charging phones or plugging in other small (but important) devices.
Once you’re in the country, it makes sense to stop by a store like Media Markt or Euronics (most malls will have one or both) for a dedicated EU adapter for whatever country you’re from or, for USB charging, a European wall charger.
Dedicated adapters are easier to use on a long-term basis than the travel adapters, but it’s a good idea to have at least one adapter that’s good for multiple countries, so you’re not having to buy different devices just for short visits to different parts of the world.