How to Find Density

Find an object's mass in grams as a first step toward finding its density.
••• apple on scale (focus on scale) image by Pontus Edenberg from

An object's density is the ratio of its mass to its volume. A very dense object has tightly packed, or compact, matter. Finding the density of an object is easier than you think.

    Find the object's mass. Density is equal to an object's mass divided by its volume. Note that to properly calculate density, you need to find the mass in grams. You can use a balance with gram weights, or you can find the mass with a scale and convert the units to grams.

    Find the object's volume. There are two ways to find volume. If the object is regular, you can use a volume formula. For example, the volume of a rectangular prism equals width x height x length. To make this calculation, measure the width, height and length of the object in centimeters. You can also use a graduated cylinder to measure volume. Simply fill the graduated cylinder with water and note this measurement. Drop the object to be measured in the cylinder. Find the difference between the new and original measurements on the graduated cylinder. This is the object's volume. For your density calculation, you will need a volume in cubic centimeters, so convert units accordingly.

    Use the object's mass and volume to find density. Density equals mass divided by volume. Simply make this calculation, and you have found the object's density. Make sure to label your final calculation with the proper units: g/cm^3.

    Things You'll Need

    • Balance or scale
    • Ruler
    • Graduated cylinder

Related Articles

How to Convert Mass to Density
Ways to Determine Density
How to Find and Calculate the Weight of a Sphere
How to Determine Density
How to Calculate the Mass of a Solid
Conversion of LBM to Gallons
How to Find the Volume of a Sphere in Terms of Pi
How to Measure Mass & Density
How to Calculate Liquid Volume
How to Use Water Displacement to Calculate Volume
How to Find Mass From Density
How to Measure the Volume of a Solid Object
Volume Vs. Mass Density
Difference Between Density & Mass
How to Calculate Volume of a Rectangular Prism
Gallons to Kilograms Conversion
How to Convert Yards to Metric Tons
Density to Molarity Conversion
The Best Way to Check Density

Dont Go!

We Have More Great Sciencing Articles!