When traveling with an iPad or Apple device you simply need to bring the correct adapter plug for the country you are visiting. Plug your iPad into the adapter and then plug your adapter into the countries wall outlet to charge your device.
Apple products, such as your iPhone, iPad and laptop, are dual voltage, therefore you do not need a converter. You can tell if you if your electronic device is dual voltage by looking on the voltage rating on the device.
If you are traveling with a Macbook laptop computer, you may want to bring along a surge protector to keep your computer safe when connecting to foreign power supplies that can be unpredictable.
For a demonstration on how to tell if your electronic device is dual voltage, watch Going In Style's Video on Dual Voltage.