Posted March 16th, 2013, 05:18 PM
One additional thing to consider is that you might end up in a situation where you would need a converter. We always carry one with us and in October used it during our pre-cruise hotel stay in Paris. You might also need it for extended delays at a foreign airport.
Another option is only to travel with electrical gear that is dual-voltage. As an example, many US-purchased curling irons can auto-switch internally beteen 110 and 220V. Our phone chargers also have this feature; maybe yours does too?
Check anything you might want to plug in during your trip - camera battery charger, computer charger, hair appliances, phone charger, etc etc. Higher wattage appliances such as a hair dryer typically do NOT auto-switch; for those 'dual voltage' usually means there is a switch on the device you must flip to use it with one voltage or the other.
You may need reading glasses to check the labels on your gear, but it'll be worth it if it will save you the need to bring a voltage transformer. Look for a notation regarding input power. If the text says the input range is 110V to 240V, your device is dual voltage. You can use a plug adapter, but do not need to use a power converter/transformer.
Of course, even if your device could function on both voltages, to use the 220V outlet you would still need a plug adapter to adapt the US two-prong plug to the EU two-pin plug. Luckily the plug adapters don't weigh NEARLY as much as a true voltage transformer.