Enter the number of bricks or blocks to estimate how much mortar you need.
About this calculator
Overview
Mortar is used to bind building blocks like stones, bricks, and concrete masonry units. The amount needed depends heavily on the joint size (commonly 3/8 inch) and the size of the unit.
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Pro Tips
Always account for dropped mortar (waste), usually 10-20%.
Pre-mixed mortar just needs water. Masonry cement requires mixing with sand.
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Fun Facts
"Standard modular brick size is roughly 4 x 8 inches."
"A typical 80lb bag of pre-mixed mortar yields about 0.6 to 0.7 cubic feet of wet mix."
"Concrete blocks (CMU) usually require 1 bag per 10-12 blocks."
Formula: Rule of thumb: 1 bag (80lb) mortar mix per 35-40 standard bricks.
