Concrete Block Calculator
Estimate the number of concrete blocks for a wall. The result updates as you type, with the working underneath so you can check it.
Your details
Result
Blocks needed
166
9.88 per m²
- Wall area
- 16.00 m²
Good to know: blocks per m² = 1 ÷ face area with joints
Please note: Estimates only. Measure your actual space, buy a little extra, and check product labels, safety requirements and local building rules. Do not rely on this for structural or safety-critical work.
About this tool
Formula
blocks per m² = 1 ÷ face area with joints
Questions people ask
How many blocks per square metre?
About 9.9 for 440 × 215 mm blocks with 10 mm joints.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
Spotted a mistake? Tell us and we'll check it. How we check our calculators