Concrete Block Weight

How Much Does A Concrete Block Weigh?

Concrete blocks, also called cinder blocks or breeze blocks, are a sturdy and lasting construction material used for various building projects. They’re strong and durable, which makes them ideal for walls, foundations, and more. Further, these blocks are cost-effective for a wide range of residential, public, and industrial construction applications. 

If you’ve been in the construction industry for a while, you would know just how many different stages of a project depend on this little piece of information.

Types of Concrete Blocks and How Much Do They Weigh?

Standard Concrete Blocks

Standard concrete blocks, also known as concrete masonry units (CMUs), are commonly used for various construction purposes. These come in different sizes, with the most common dimensions being 440mm x 215mm x 100mm (length x width x height). The weight of a standard concrete block of this size typically ranges from 18 to 20 kilograms (around 40 to 44 pounds).

Mostly, these blocks are hollow inside, creating room for vertical rebar support. Additionally, these empty spaces, called cells, can be filled with concrete to increase their strength. Standard blocks are resilient and are often used for constructing foundation walls. They are placed individually and secured with mortar joints. 

Moreover, the weight of a standard concrete block may vary slightly depending on factors like:

  • Moisture content 
  • The specific mix design used in its production

In the UK, these blocks follow the British Standard BS EN 771-3, which specifies the manufacturing requirements, including dimensions and weight.

Lightweight Concrete Blocks

Lightweight concrete blocks are an alternative to the ones mentioned above. As the name suggests, these are designed to be less dense and lighter in weight, which makes them easier to handle and transport. Also, you’ll often see them in action where there are non-load-bearing walls and partition walls.

The weight of a lightweight concrete block can vary depending on its density. It is usually expressed in terms of kilograms per cubic meter (kg/m³). Additionally, a typical lightweight concrete block might weigh between 9 to 13 kilograms (around 20 to 29 pounds) for a block with a size of 440mm x 215mm x 100mm.

Dense Concrete Blocks

Dense concrete blocks, also known as solid concrete blocks, are heavier and more robust than standard concrete blocks. They are commonly used in load-bearing applications, such as the construction of structural walls and foundations.

Further, the weight of dense concrete blocks can vary depending on the same factors as the above. For a standard dense concrete block with dimensions of 440mm x 215mm x 100mm, the weight can range from 23 to 25 kilograms (approximately 51 to 55 pounds). However, it’s essential to consider variations based on manufacturer specifications and local production standards.

Aerated Concrete Blocks

Aerated concrete blocks are a relatively newer addition to the construction industry in the UK. They are known for their:

  • Lightweight nature 
  • Insulating properties

These blocks are often used in projects that require good thermal performance and reduced structural weight. The weight of aerated concrete blocks is notably lower than that of traditional concrete blocks. 

For a block that is 440mm x 215mm x 100mm, the weight typically falls between 7 to 9 kilograms (approximately 15 to 20 pounds). Moreover, its impressive features make aerated concrete blocks a popular choice in energy-efficient construction.

Factors Responsible for the Weight of Different Concrete Blocks

Most of these factors are already briefly stated, but here is a little elaboration on each one:

Block Dimensions

It goes without saying, really. One of the most obvious factors is the size of the concrete block itself. It’s intuitive that larger blocks are naturally heavier than their smaller counterparts. This simple relationship between size and weight underscores the significance of block dimensions in determining their overall mass.


Moreover, the density of the concrete mix used in the production of these blocks is another critical factor. It plays a pivotal role in shaping the weight of the concrete blocks. Lightweight blocks, for instance, are created using less dense concrete mixes, resulting in significantly reduced block weights compared to their denser counterparts.

Moisture Content

The moisture content of concrete blocks at the time of measurement can also substantially impact their weight. Further, blocks that have not undergone the complete curing process or have absorbed moisture tend to be heavier than their fully cured and dry counterparts.

Manufacturing Standards

Concrete block production is governed by specific manufacturing standards, such as the UK’s British Standard BS EN 771-3. These standards dictate the precise dimensions and weight specifications for concrete blocks. 

Manufacturers adhere to these standards rigorously to ensure uniformity and quality in their products.


Some concrete blocks incorporate steel reinforcement, a common feature in blocks designed for structural applications. This addition greatly increases the weight of the blocks, adding to their durability and strength.

Transportation and Handling

While not a characteristic of the concrete block itself, how blocks are handled and transported can also influence their overall weight. Additionally, stacking blocks tightly or mishandling them can cause minor surface damage or variations in moisture absorption, ultimately affecting the block’s weight.

Geographic Location

The geographic location of block production can indirectly influence weight. All due to differences in local manufacturing standards, raw materials, and climate conditions that might affect the curing process!

Why Do You Need To Know How Much Concrete Blocks Weigh?

Structural Soundness

Accurate weight calculations are essential to maintain the integrity of a building’s structure. Using excessively heavy blocks for non-load-bearing walls can impose unnecessary stress on the foundation, potentially leading to serious issues. Conversely, using blocks that are too light for load-bearing walls can compromise the building’s stability.


The knowledge of concrete block weights aids in selecting appropriate vehicles and guarantees the secure handling of blocks during transit. It prevents overloading, which could be dangerous, and helps optimize logistics to minimize transportation costs.

Labour and Safety

Construction workers must be well-informed about block weights to:

  • Prevent injuries 
  • Work safely

Proper lifting and handling techniques help to avoid strains, back injuries, or accidents on the construction site. In a nutshell, the knowledge contributes to a safer working environment.

Cost Estimation

Additionally, accurate weight data is a fundamental component in estimating material costs for a construction project. It allows project planners and contractors to determine the required quantity of blocks, helping in budgeting and cost control.

Adherence to Building Codes and Regulations

Compliance with building codes and regulations is a non-negotiable aspect of construction in the UK. Awareness of block weights means that construction practices align with these standards. Using blocks that meet weight specifications established by building codes guarantees the safety and quality of the structure and avoids potential legal issues.


In the world of construction, knowing the weight of concrete blocks is more than just an incidental detail; it’s a cornerstone of efficient, safe, and cost-effective building projects. Being well-versed in the weights of different types of concrete blocks allows for informed decision-making in the construction industry, contributing to the success and longevity of building projects.

Luckily for you, Pro-Mix Concrete is always ready to help you. Be it the material you need or simply some authentic information regarding using concrete, you can trust us. 

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