Solid blocks and hollow blocks are the main types of concrete blocks. They are available in various sizes and configurations, each designed to meet specific structural and aesthetic requirements. Understanding the different concrete block sizes and their applications is essential for ensuring the success of any construction endeavor.
Standard Solid Concrete Block Sizes:
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4-inch block size
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6-inch solid block size
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8-inch block size
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10-inch concrete blocks
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12-inch concrete blocks
Cement Block Size Chart
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Nominal Size (mm)
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Length (L)
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Height (H)
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Width (W)
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400 x 200 x 200
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400 mm
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200 mm
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200 mm
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400 x 200 x 150
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400 mm
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200 mm
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150 mm
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400 x 200 x 100
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400 mm
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200 mm
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100 mm
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500 x 200 x 200
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500 mm
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200 mm
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200 mm
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500 x 200 x 150
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500 mm
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200 mm
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150 mm,
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500 x 200 x 100
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500 mm
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200 mm
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100 mm
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600 x 200 x 200
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600 mm
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200 mm
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200 mm
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600 x 200 x 150
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600 mm
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200 mm
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150 mm
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600 x 200 x 100
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600 mm
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200 mm
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100 mm
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Calculations of Concrete Block Sizes:
The dimensions of concrete blocks are crucial for determining the amount of material needed for a project. The volume of a concrete block can be calculated using the formula:
Volume (V) = Length (L) x Height (H) x Width (W)
For example, let's calculate the volume of a standard 39 cm x 19 cm x 30 cm concrete block:
V = 39 cm x 19 cm x 30 cm
V = 22,230 cubic centimeters
To convert the volume to cubic meters (m³), divide the result by 1,000,000:
V (m³) = 22,230 cm³ / 1,000,000
V (m³) ≈ 0.0223 m³
Note: Read this article to learn everything about Cinder Blocks.
Solid Concrete Block Sizes:
Solid concrete block sizes are commonly available in standard dimensions of 4", 6", and 8 inches. The following chart summarizes the nominal and actual dimensions for these block sizes
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Block Size
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Nominal Dimensions (D x H x L)
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Actual Dimensions (D x H x L)
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4 inch Block Size
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4" x 8" x 16" or 100 mm x 200 mm x 400 mm
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3 5/8" x 7 5/8" x 15 5/8"
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6-inch Cement Block Size
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6" x 8" x 16" or 150 mm x 200 mm x 400 mm
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5 5/8" x 7 5/8" x 15 5/8"
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8" Block Size
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8" x 8" x 16" or 200 mm x 200 mm x 400 mm
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7 5/8" x 7 5/8" x 15 5/8"
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These dimensions are based on the National Concrete Masonry Association (NCMA) standards and are used for planning bond patterns and modular layouts with respect to door and window specifications.
Hollow Concrete Blocks:
The concrete hollow block sizes can vary, but they are typically available in the following standard sizes:
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4" x 8" x 16" (actual dimensions: 3 5/8" x 7 5/8" x 15 5/8")
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6" x 8" x 16" (actual dimensions: 5 5/8" x 7 5/8" x 15 5/8")
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8" x 8" x 16" (actual dimensions: 7 5/8" x 7 5/8" x 15 5/8")
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10" x 8" x 16" (actual dimensions: 9 5/8" x 7 5/8" x 15 5/8")
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12" x 8" x 16" (actual dimensions: 11 5/8" x 7 5/8" x 15 5/8")
These are the most common sizes, but other sizes may also be available from local concrete masonry producers. Half-sizes of these blocks are also available for some of the above dimensions. The actual dimensions are slightly smaller than the nominal dimensions to account for the standard 3/8" mortar joint. The dimensions of a hollow block size in inches can vary, but an example of a hollow concrete block is 400 mm (length) x 150 mm (width) x 200 mm (height) with a partition thickness of 25 mm and a wall thickness of 25 mm.
Note: Go through this article before you buy 4-inch, 6-inch and 8-inch Solid Blocks.
Conclusion:
The article comprehensively overviews standard concrete block sizes, solid and hollow blocks, and their respective dimensions and calculations. It also offers a solid block size chart for 4-inch, 6-inch, and 8-inch blocks and explains the importance of understanding block sizes for construction projects. Additionally, it outlines the calculation of concrete block sizes and provides a concrete block calculator for estimating the number of blocks needed for a wall with specific dimensions. The information is valuable for individuals involved in construction and masonry work, as it helps plan and estimate materials for various projects.
