Mass vs Density: Difference and Comparison

‘Mass’ and ‘density’ are two terms that are used interchangeably in most cases. These two terms imply entirely different meanings and help quantify matter.

They are related to each other in terms of formula but mean different things.

Key Takeaways

  1. Mass measures the amount of matter in an object, expressed in units such as grams or kilograms.
  2. Density is the ratio of an object’s mass to its volume, representing how compactly the mass is distributed within the object. It is measured in units like grams per cubic centimeter or kilograms per cubic meter.
  3. Both mass and density are fundamental properties of matter, but they describe different aspects: mass quantifies the amount of matter, while density describes its distribution within a given volume.

Mass vs. Density

Mass, in the realm of physics, is the measure of the total amount of matter present in an object, and it is measured in units of kilograms. Density is the measure of how much mass is contained within a specific unit of volume. It is expressed in units such as kilograms per cubic meter.

Mass vs Density

Mass is the quantity of matter present in any substance or thing that can be expressed in units such as kilograms or grams.

On the other hand, density is a different concept that defines how much mass is present in any substance concerning its volume. This should be clearly understood that the mass of an object remains the same and is never influenced by the force of gravity.

This should be kept in mind that the mass of any object is not similar to the weight of the thing.


Comparison Table

Parameters of comparisonMassDensity
DefinitionMass is the total amount of matter present in any object.Density is the total mass of any object concerning its volume.
FormulaThe mass of any object can be depicted by-
Mass= density*volume
The density of any object can be depicted by-
Density= mass/ volume
SI unitIt is expressed by the unit grams or kilograms.It is expressed as gm/cm3 or kg/m3
State of matterThe mass of any object doesn’t define the shape of the case.The density of any object helps depict the state of matter.
CharacteristicMass is the measure of inertia.Density is used to define the compactness of any object.


What is Mass?

Mass is the property of any substance that depicts the total amount of matter present in that substance. The critical aspect of mass is that it remains constant everywhere because it is not affected by the force of gravity. For example, if a ball has a mass of 2 kg on earth, then its mass on the moon will also remain the same. Even though the force of gravity changes but the mass never changes.

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Mass is also the measure of inertia of any object, which means the heavier the body, the more it will resist movement. It broadly represents the matter present in anybody.

It is expressed by the unit kilograms or grams. Mass is a scalar quantity because the direction of the object does not determine it.

The mass of any object is extrinsic property because it denotes the amount of matter present in the substance.

It should also be noted that mass and weight are different. Weight changes with gravitational force, but the group doesn’t change.


What is Density?

Density is the property of any substance that determines the object’s total mass concerning its volume. It is the most used concept in science that defines the degree of compactness in any sense.

Density depicts the state of matter, denoting whether something is solid, liquid, or gas.

To know the density of any object, we have to divide the object’s mass by the volume it occupies. Indeed, the thickness can also be called the space occupied by any entity.

The object’s density remains the same no matter its shape or size. It changes with different temperatures and pressure.

Most of the time, density is responsible for the sinking and floating of objects. The objects with less density float, whereas those with higher density sink.

For Example, a wood log floats in water, whereas an iron nail sinks.

The density of any substance is the intrinsic property because it doesn’t depend on the quantity of the matter contained.

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Main Differences Between Mass and Density

  1. Mass is the total amount of matter in any substance, whereas density is the total mass in any object concerning its volume.
  2. The object’s mass changes shape and size, whereas the density of any object remains the same irrespective of its shape and size.
  3. Mass measures inertia in any object, whereas density defines the degree of compactness in any object.
  4. The mass of any object is given by density × volume, whereas the density of any object is given by mass ÷ volume.
  5. The SI units that represent the mass of any object are kilograms and grams, whereas those of density is kg/m3 or gm/cm3.
Difference Between Mass and Density


Last Updated : 11 June, 2023

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24 thoughts on “Mass vs Density: Difference and Comparison”

  1. The article does a great job at breaking down the concepts of mass and density, making it accessible for readers to understand. Well done!

  2. This article offers valuable insights into the concepts of mass and density, providing a clear understanding of their differences and applications in physics.

  3. I found the article to be quite informative and helpful in distinguishing between mass and density. This content is important for building a thorough understanding of physics.

  4. The article presents an in-depth analysis of mass and density, offering a comprehensive understanding of their significance in physics and science.

  5. While the article successfully explains mass and density, it could have delved deeper into the impact of these concepts in other scientific fields.

  6. The information provided is comprehensive, and the comparison table is particularly useful to highlight the differences between mass and density.

  7. This article provides a fantastic explanation of the differences between mass and density, and how they are related to physics and science. The examples given are really helpful to understand these concepts.

  8. This article does a decent job in outlining the difference between mass and density, but I wish it would have included some more examples to further illustrate the concepts.

  9. This article does a fine job in elucidating the differences between mass and density. The content is presented in a logical and coherent manner, which aids in understanding these concepts.

  10. Although the article provides valuable information, it could benefit from incorporating some real-world applications of mass and density to further engage readers.


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