Cleaning the Hard Drive


In Runtime
Ive been trying to clean off my laptop hard drive lately and it has only about 10gb of space left. The thing of it is, I don't have that many documents stored on this computer.. ITs kind of a mystery so my question is, is there a place or folder to go that will tell me how much space each folder/program is taking up from a birds view? I don't want to have to sort through every individual file to find out how much space it takes up. Any help is really appreciated!