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Mortar Calculator

Size the mortar for a brick or block job from real geometry — wall area, unit type and joint thickness — with premix bag counts, a site-mix cement & sand estimate, U.S. pricing, and a downloadable PDF.

Mortar yields vary by mix, joint size and workmanship — follow the bag maker's coverage. Prices use 2024-2025 U.S. figures. For planning purposes only.

Wall & Mortar
1 Wall Area
ft
×
ft
x
−21 sf
−15 sf
sq ft
Length × height × walls − openings. Edit to enter a known area.
10%
Mortar dropped off the board, in the mixer, and left over
2 Units & Joint
in
Standard is 3/8 in (0.375). Thicker joints use more mortar per unit.
3 Bag & Cost
$
$
Total cost prices the premix path; sand $/ton feeds the site-mix comparison.
Mortar Estimate
Mortar Bags Needed
—
Enter your wall to begin
Mortar Volume —
Units Covered —
Mortar Sand —
Materials & Mix
Masonry unit—
Units per sq ft—
Joint thickness—
Units per bag at this joint—
Units covered—
Site-mix cement bags + sand—
TOTAL MORTAR BAGS—
Volume —
Coverage —
Total Cost —
Mortar By Joint
Premix bags for your wall, by joint thickness
Joint Thickness Comparison — Your Wall
JointUnits / BagBagsSand (ton)

For your 748 units. Thicker joints use more mortar and more bags.