Concrete Block Calculator

Calculate the number of concrete blocks required for your project. Essential for construction work and DIY home projects.

Wall height:
Wall width:
Wall area:
I want to:
Block size:
Number of blocks needed:
Single blocks price:
Total cost:

A concrete block calculator is an invaluable tool for construction professionals, DIY enthusiasts, and anyone involved in building projects. This tool simplifies the process of estimating the number of concrete blocks required for a specific project, helping ensure accurate material ordering and minimizing waste.

How to Do Concrete Block Calculation

Determine Project Specifications: Before using the concrete block calculator, gather essential project details such as the dimensions of the structure, the thickness of the walls, and any openings like doors or windows.

Enter Block Dimensions: Input the dimensions of the concrete blocks you plan to use. This includes the length, width, and height of the block. Standard block sizes are 8 inches by 8 inches by 16 inches, but variations exist.

Specify Mortar Thickness: Account for mortar thickness between blocks. Typically, a 3/8-inch mortar joint is standard, but it can vary based on project requirements.

Calculate Total Blocks: Once the details are entered, the calculator will determine the number of concrete blocks needed based on the provided dimensions and mortar thickness.

Concrete Block Calculation Formula

The formula for calculating the number of concrete blocks required for a wall or structure is relatively straightforward. The key variables in the equation include the dimensions of the wall, the dimensions of the concrete blocks, and the thickness of the mortar joints.

Here's the basic formula:

Total Blocks=Total Wall AreaArea of One Block Including Mortar Joints

The equation is broken down into the following steps:

Calculate the Total Wall Area

Total Wall Area = Length x Height

Calculate Area of One Block Including Mortar Joints

Area of One Block Including Mortar Joints = (Block Length + Mortar Thickness) x (Block Height + Mortar Thickness)

Plug Values into the Formula

Total Blocks=Total Wall AreaArea of One Block Including Mortar Joints

Here are the variables used in the formula: