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Concrete Block Calculator

This calculator helps you estimate the number of concrete blocks required to build a wall or surface. Just enter the total wall dimensions and the size of a single block — the tool does the rest. Ideal for builders, contractors, and DIYers during project planning.

Calculate Number of Blocks Needed for Construction

Input Fields
bh
mm
bw
mm
wh
m
ww
m
If enabled, the result will update automatically when you change any value.

Concrete Block Quantity Formula

Formula
$$\text{Number of Blocks} = \frac{\text{Length} \cdot \text{Width}}{\text{Block Size}}$$

Where

  • Length — total length of the wall/surface
  • Width — total height of the wall/surface
  • Block Size — area of one concrete block (e.g., in ft² or m²)


This calculator is great for estimating how many concrete blocks you’ll need based on your wall dimensions and the block size. You can also include a wastage percentage if needed to account for breakage or cuts. A helpful tool for budgeting and material planning.

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