Here's a website that might be of some help (I have no affiliation with them other than that I ordered from one of the advertisers):
World Electric Guide
(I guess someone was quicker than me in posting that site. Took me a few mins to find that site again.)
The simpliest answer is that you should look on your plugs/adaptor to see what it supports. For example, my laptop and phone chargers both say something like 110-240V, 50-60HZ, which basically means that I can use it pretty much anywhere as long as I have a plug adapter to fit them into the outlet.