About this concrete block calculator
A standard 8 × 16 in block with its mortar joint covers 128 sq in, so 1.125 blocks per square foot. A 40 × 4 ft wall is 160 sq ft: 180 blocks, 189 with 5% waste. Each course is 8 in, so 4 ft is 6 courses.
CMU
Concrete Block Calculator
Details
How to use Concrete Block Calculator
What the tool does, how to run it, and what to expect from the result.
At a glance
Who Concrete Block Calculator is for
A quick way to understand who this helps, what it solves, and where it connects next.
Best fit
Homeowners, DIYers and contractors estimating materials before a store run.
Ideal for
Using the concrete block calculator without installing anything or signing up.
FAQ
Common questions
Short answers for the questions people usually have before trying a utility like this.
How many blocks are in a square foot?
1.125 standard 8 × 16 in blocks.
Do corners need special blocks?
Use corner (bullnose or end) blocks at corners and openings; count them from the total.
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