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Abstract Architecture
Writer's pictureDennis Asis
Jul 262 min read

How many hollow concrete hollow blocks (CHB) do I need? building construction materials estimate

Updated: Nov 14

Understanding the Basics

Determining the exact number of concrete blocks for your building construction materials estimate project requires a few basic measurements and calculations. Here's a breakdown:


Diagram showing how to calculate the number of concrete hollow blocks (CHB) needed for a wall based on its length, height, and the dimensions of a single CHB.
How do you calculate the quantity of concrete blocks?

1. Measure Your Wall:


  • Height: Determine the desired height of your wall.

  • Length: Measure the total length of the wall.

  • Thickness: Decide on the thickness of the wall (usually determined by the block size).


2. Calculate Wall Area:

  • Multiply the height by the length to find the total square footage of the wall.  


3. Determine Block Size:

  • Standard block sizes are commonly 8 inches by 16 inches.   

  • Check the specific dimensions of the block you plan to use.


4. Calculate Block Area:

  • Multiply the height and length of one block to find its area.


5. Divide and Conquer:

  • Divide the total wall area by the area of one block to estimate the number of blocks needed.


6. Account for Openings:

  • Subtract the area of doors, windows, and other openings from the total wall area.   

  • Recalculate the number of blocks based on the adjusted wall area.


7. Add a Buffer Allowance -building construction materials estimate:

  • It's always wise to add 5-10% extra blocks to account for breakage or unexpected issues.


For a time saver estimate use this online estimating tool calculator.



Use this Universal Length converter if necessary.



Use Desktop or Laptop Computer for best performance of this apps.


Note:


It is still best to consult a professional. This tool serves only a supplementary and aid. Use this as your plain guide. Enjoying the tool? Support us by sending gifts donations via Paypal. Any amount in kind will be appreciated. 100% safe and secure


Disclaimer:


Our online calculator is a helpful tool to give you a general idea. We do our best to make sure the numbers are right, but we can’t guarantee they’re perfect for every situation. You should always double-check the calculator’s results and maybe talk to an expert for advice on your specific project. By using the calculator, you agree that we’re not responsible if something goes wrong based on the numbers it gives you."


 

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