Free Tool
Free brick and block calculator
Enter your wall size and get the number of bricks or blocks plus the mortar bags, with a waste allowance built in. Free, no signup.
10% covers cuts and breakage
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Count the wall, not the guesswork
Masonry runs on count. A standard modular brick covers about 6.9 square feet of wall per, with a 3/8 inch mortar joint; a standard 8 by 8 by 16 block is about 1.125 per square foot. Pick the unit, enter the wall, and the calculator gives you the count with waste already added.
Mortar is the part people shortchange. It swings with the joint size and the mason's hand, so the bags here are an estimate to get you close, not a promise. Buy a little extra rather than stopping the pour to run for more.
Waste matters more than it looks on masonry. Cuts at corners and openings, plus breakage in the pile, add up fast, so ten percent is a fair starting point and a cut-up wall earns more.
For a big wall with windows and doors, subtract the large openings from the area before you order so you are not paying for brick you will never lay.
Brick & Block Calculator questions
How many bricks per square foot?
About 6.9 for a standard modular brick with a 3/8 inch mortar joint. The calculator uses that and adds your waste.
How many blocks per square foot?
About 1.125 for a standard 8 by 8 by 16 block. Pick block in the calculator and it counts them.
How much mortar do I need?
It varies with joint size and technique. The calculator estimates bags from the count; buy a little extra to be safe.
Is this really free?
Yes. No email, no signup, and nothing you type leaves your browser.
Turn the takeoff into a priced estimate
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Disclaimer: These free tools and templates are provided for general information and estimating purposes only. All results — including quantities, material and cost estimates, load, sizing, and span figures, scores, and any guidance or warnings — are rough approximations that may not fit your specific project, site conditions, local building codes, or current prices. They are not engineering, architectural, structural, legal, financial, or other professional advice, and are not a substitute for a licensed engineer, architect, contractor, or other qualified professional. Always confirm quantities, sizing, and structural, electrical, mechanical, and code requirements with a licensed professional and your local authority having jurisdiction before purchasing materials or performing any work. Werx makes no warranty as to accuracy and accepts no liability for any decision made using these tools. Use at your own risk. See our Terms of Service.