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Concrete Block Calculator
Calculate CMU blocks needed for a wall. Standard 8×8×16 block covers 0.89 sq ft. Includes mortar and rebar quantity.
LIFESTYLECalculate CMU blocks needed for a wall. Standard 8×8×16 block covers 0.89 sq ft. Includes mortar and rebar quantity.
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
Disclaimer: Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Concrete Block Calculator
CMU blocks (8"×8"×16") for foundation, retaining, or garage walls. 1.125 blocks per sq ft of wall with mortar joints. 5% waste added.
Blocks Needed
189
Wall area160 sq ft
Mortar bags (80-lb)17
Block cost$473
Frequently Asked Questions
What is the Concrete Block Calculator for?
Calculate CMU blocks needed for a wall. Standard 8×8×16 block covers 0.89 sq ft. Includes mortar and rebar quantity.
How do I use the Concrete Block Calculator?
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
How accurate are my concrete block results?
Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
Is the Concrete Block Calculator free to use?
Yes - every calculator on WhichCalc is completely free with no signup, no usage limits, and no tracking on the calculation itself. Results display instantly in your browser and your inputs are never sent to a server. Bookmark the page if you use this calculator regularly.