**The density of a pencil varies based on the type of pencil, but it can be found by measuring the pencil's mass, preferably in grams, and then dividing the mass by the volume.** The formula for density is density = mass/volume.

Usually, the volume of a pencil is less than 1 gram per centimeters to the third, or 1 g/cm^3, which is usually why a pencil will float in water. Fresh water has a density of 1 g/cm^3. Because a pencil typically has a lower density than water, it will float.

The mass of a pencil can be found by measuring its weight in grams. Then, to calculate a pencil's volume, people should multiply the length times the width times the height. Mass is divided by the volume to calculate density.