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Concrete Block Calculator
Estimate concrete blocks (CMU) and mortar for any wall.
How does the concrete block calculator work?
A standard 8×8×16 CMU covers 0.888 ft² of face (128 in² ÷ 144). Divide wall area by that number to get block count.
Formula: blocks = (L × H) ÷ 0.888 × (1 + waste%)
Which guide explains this in more depth?
- How inspectors check brick and mortar counts on a single-wythe wall. Read the inspector-approved brick calculator method guide for the full worked example.
What else do people ask about this calculator?
How many concrete blocks in a 10×10 wall?
A 10 ft × 10 ft wall is 100 ft², so ~113 8×8×16 blocks plus about 4 bags of mortar.
How many blocks in a bag of mortar?
About 30 CMU blocks per 70 lb bag of type S mortar.
Which related calculators should I use next?
Where can I learn more about these materials?
Weights, coverage, types and buying tips for the materials this calculator estimates.
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