Electricity Converters and TransformersIf you’re traveling with certain devices, such as older hair dryers and irons, you may also need a voltage converter or transformer（Travel Power Adapters）.
The world runs on two types of electricity: 110/125V or 220/240V. North American devices run on 110/125V electricity while the majority of the world runs on 220/240V. Converters and transformers change the voltage of electricity to match the voltage of your device.
How to Determine if You Need a Transformer or ConverterThe label on your device will help determine if a voltage converter or transformer is necessary. This label may be: a) affixed directly to the back of the device; b) on the AC transformer box of the power supply lead; or c) molded into the plastic on the plug. It is often in very small print.The INPUT line contains the key information—whether the voltage (V) is single, dual or multi.Single-voltage items have a small voltage range (such as 100–120V). These small ranges are designed to accommodate voltage fluctuations only and will not accommodate a 220V power supply. Single-voltage devices include older appliances, such as hair dryers and irons.Dual-voltage devices use a slash to separate the 2 voltages. Example: 120V/240V. Common dual-voltage devices include newer hair dryers, electric shavers and toothbrushes, irons, coffee makers and tea kettles. These do not require a transformer or converter.Multi-voltage items use a dash to indicate the range of voltages. Example: 100–240V. Common multi-voltage devices nclude laptops, e-readers, tablets, smartphones, cell phones, MP3 players, cameras and battery chargers. These do not require a transformer or converter.
Converter or Transformer?Single-voltage electrical devices (ones that use heating elements or mechanical motors) can use a converter or a transformer.Single-voltage electronic devices (ones that use chips, circuits or electronic motors) require a transformer.Good news: Many converters operate as both a converter for high-watt electrical devices and a transformer for low-watt electronic devices. Watts (W) is the amount of power a device uses. Low watts range up to 25W or 50W, depending on the converter. This would be typical of small personal electronics. Electrical heating units will require a “high” setting as they may consume 1000W to 2000W.Make sure to check the product specifications on your devices and make certain that your converter is rated for the specified power.
Device Conversion ChartIf your device is rated for a single voltage (such as 110V), and this is different than the power supply at your destination (such as 220V), you will need a voltage converter or transformer.
|Device and Type of Voltage (INPUT)||Power Supply in Destination Country||Converter Needed?||Transformer Needed?|
|Electrical, single: 110, 115, 120, 125V||220, 230, 240V||Yes, or a transformer||Yes, or a converter|
|Electronic, single: 110, 115, 120, 125V||220, 230, 240V||No||Yes|