What Is The Density Of Styrofoam?  

Before knowing the density of styrofoam, you must have an idea of styrofoam. Many people thought styrofoam is similar to plastics. Are you one of them? So, styrofoam is not the same as plastic, even if it is a type of plastic material. There are many events in which people use plastic as a substitute for Styrofoam materials. One of the good examples is in making cups and food containers. Styrofoam is mainly made out of styrene which is a petroleum-based product. It is made by a process called polymerization and styrene is redefined into polystyrene and then a hydrofluorocarbon agent is added. Let’s get back to the density of styrofoam.  

What Is The Density Of Styrofoam? 

The density of Styrofoam is between 0.96 g/cm3 and 1.05 g/cm3. There are so many things made from styrofoam like styrofoam balls, styrofoam cups, toys, etc. well, the density of styrofoam ball is 300 kg/m3 while the density of styrofoam cup is 1.05 g/cm3. Various substances are added to styrene while making things from it, therefore its density is different from pure styrofoam. The styrofoam density changes with the temperature, it is inversely proportional to the density. When the temperature rises, more molecules of styrofoam get occupied in that particular space and hence the volume gets increased. Volume is inversely proportional to density, and when volume decreases ultimately density gets decreased. 

Styrofoam density can be expressed in other units like, 

  • The density of styrofoam g/cm3 is 1.05 g/cm3
  • The density of styrofoam kg/m3 is between 11 to 32 kg/m3 
  • The density of styrofoam g/ml is 0.015 g/ml
  • The density of styrofoam lb/ft3 is 7 lb/ft3
  • The density of styrofoam in pounds is between 1.35 to 1.80 pounds per cubic foot. 

Now, you know the density of styrofoam in g/cm3. Let’s have a look at the definition of styrofoam density. 

Definition Of Density Of Styrofoam 

The density of styrofoam is defined as the ratio of mass to volume. It is also defined as the amount of Styrofoam present per cubic space or the ratio of the mass to the volume of the Styrofoam. The Styrofoam density is dependent on temperature, pressure, mass, volume, etc. Styrofoam density is inversely proportional to volume and temperature, which means when volume or temperature increases the density decreases and vice versa. Similarly, the Styrofoam density is directly proportional to the mass and the pressure, which means when mass or pressure increases the density also increases and vice versa. 

The definition of Styrofoam density can be expressed in the equation form as, 

The density of Styrofoam = mass of Styrofoamvolume of Styrofoam g/cm3 

In the symbolic form, 

               D =    mv g/cm3 

Where, d – the Styrofoam density, 

             v – the volume of Styrofoam, and 

            m – the mass of Styrofoam 

How To Calculate Density Of Styrofoam? 

To calculate Styrofoam density you need only two quantities and they are mass and volume. Well, it is very easy and simple to measure the mass of Styrofoam. For that, just weigh Styrofoam by using a balance and note it down. Now, the volume of styrofoam is dependent upon the shape of the selected styrofoam segment. If you take a rectangular segment of styrofoam, then its volume will be the Height x Length X width of that rectangular segment. 

Now, you have both quantities, just divide mass by volume you will get the Styrofoam density. 

For Example, 

Let’s take an example. 

A rectangle-shaped segment of styrofoam material with the parameters of 10 cm of length, 2 cm of width, and 5 cm of height. The mass of the segment is 96 grams, what is the density of styrofoam?  

So, for the rectangular segment, the volume is = 10 x 2 x 5 

                                                                                    = 100 cm3

So, by using the formula, 

The density of Styrofoam = mass of Styrofoamvolume of Styrofoam  

                                               = 96/100 

                                               = 0.96  g/cm3 

Hence, the density of styrofoam is 0.96 g/cm3. 

Let’s find out the densities by visiting Denseme


What Is The Density Of Styrofoam Cube?

Typical polystyrene foam packaging and insulation is usually in the density range of 1 to 2 pounds per cubic foot. What this means is if you have a 12-inch x 12-inch x 12-inch cube of solid foam, it would weigh between 1 and 2 pounds.

What Is The Density Of Foam In Kg Mm3?

Linear foam’s average density is between 24-25 kg/m3, while cross-linked foam types’ density can be above 200 kg/m3.

How Much Does Styrofoam Weigh Kg?

Below, a selection of the more useful facts and figures: SL grade polystyrene weighs 13kg per cubic meter.

What Is 40 Density Foam?

A 40 density would be high density in polyfoam (PU Foam), not so much in memory foam, and very low for others. For example, in the Indian demographic, people prefer the PU Foam to have a density value between 32 and 40. Similarly, memory foam should have a density value between 50-60 and between 55-65 for latex foam


Above we have mentioned the density of styrofoam g cm3 and also in other units. Styrofoam is a very popular and also useful material like plastic. One of the best things about styrofoam is it can be recycled and reused. Styrofoam is a closed-cell extruded polystyrene foam, commonly known as “blue board”. It is manufactured as an insulation board and can be used on roofs. Walls and structures such as waterproofing and insulation. Styrofoam is 98% air, which makes it lively, light, and very useful. Dow produced and patented Styrofoam for use in building materials, including pipe insulation and various construction enclosure enclosures where density of styrofoam plays an important role.