The weight of a pencil is about 10 grams which is the equivalent of .35 ounces. This means that it takes about 45 yellow number (#) 2 pencils to make a pound. There are about 100 wooden lead pencils in a kilogram.
There are lots of different types of pencils other than the standard ones that most people think of when it comes to filling in circles on a scan-tron standardized test. Heavier pencils include large drawing pencils specially designed for artists.
It goes without saying that as pencil makes a few rounds through the automatic pencil sharpener and those pencil shaving come flying off the weight drops.