I'm going to Europe over the summer, will I be able to charge my Macbook there?

You don't need a voltage converter. If you check the power supply, it will say something like 100-240 Vac, 50/60 Hz which is telling you it's compatible with both North american and European electrical systems. You will need plug converters for both the UK and continental Europe though. You can get them at places like Radio Shack, Target, Walmart, Brookstones, most luggage stores, airport shops, or here after you arrive. You want this type for France, Italy and Switzerland: a href="http://www.amazon.com/Adapter-Plug-Europe-Universal-Polarized/dp/B000BMFHLE" rel="nofollow"http://www.amazon.com/Adapter-Plug-Europ…/a and something like this for the UK: a href="http://www.amazon.co.uk/US-UK-Plug-Travel-Adaptor/dp/B0006OFKNC" rel="nofollow"http://www.amazon.co.uk/US-UK-Plug-Trave…/a