Brick Calculator

For standard modular bricks with 10mm joints: approximately 60 bricks per square meter or 6.75 bricks per square foot. This accounts for the brick face plus mortar joint. UK standard bricks (215×102.5×65mm) need about 60/m². US modular bricks (194×92×57mm) need about 7/sq ft. King-size bricks require fewer—about 4.5/sq ft or 48/m². Always add 5-10% for waste, cuts, and breakage during construction.

One 25kg (55 lb) bag of mortar mix typically lays 30-40 standard bricks or covers about 0.5 m² (5-6 sq ft). For 1000 bricks, you need approximately 25-35 bags of mortar. Type N mortar is standard for above-grade walls, while Type S is stronger for below-grade, load-bearing, or exterior applications. Joint thickness affects usage: 12mm joints use about 15% more mortar than 10mm joints. Order 10% extra for waste.

Brick sizes vary by region: US Standard is 194×92×57mm (7-5/8×3-5/8×2-1/4"); UK Standard is 215×102.5×65mm (8.5×4×2.5"); European Standard is 240×115×71mm; Australian Standard is 230×110×76mm; Indian Standard is 190×90×90mm. "Modular" bricks are sized to work with standard mortar joints for easy calculation. Always verify actual dimensions with your supplier as sizes vary by manufacturer.

For corners, add 5% to your total brick count for additional cuts needed for bonding. For door/window openings, subtract the opening area from total wall area before calculating, but add bricks for headers above openings—typically one full course of soldier or rowlock bricks. Average window (1×1.2m or 3'×4') subtract 72 bricks. Standard door (0.9×2.1m or 3'×7') subtract 150 bricks. Include 10% waste factor in final calculations.

A wythe is a single vertical layer of bricks. Single wythe walls (one brick thick) are common for veneer, garden walls, and non-structural applications—they need 60 bricks/m² or 7/sq ft. Double wythe walls (two bricks thick) provide structural support and better insulation—requiring 120 bricks/m² or 14/sq ft. Cavity walls have two wythes with air gap between. This calculator assumes single wythe; double your results for double wythe construction.

Brick prices vary significantly: USA $0.35-1.00 per brick; UK £0.30-0.80; EU €0.25-0.70; Australia A$0.80-2.00; India ₹5-12; South Africa R1.50-4.00. Prices depend on type (common, face, engineering), finish, and quantity. Delivery adds substantial cost for small orders. Face bricks and specialty colors cost 2-3× more than common bricks. Reclaimed/antique bricks command premium prices. Get quotes from multiple suppliers for best pricing.

Running bond (stretcher bond) is most common—bricks offset by half in each course, requiring minimal cuts (~5% waste). Stack bond places bricks directly above each other—modern look but structurally weaker and needs reinforcement. Flemish bond alternates headers and stretchers for traditional appearance. English bond alternates courses of headers and stretchers. Herringbone pattern for patios needs 15% more bricks due to angle cuts. Choose based on structural needs and aesthetics.

Traditional clay bricks often benefit from brief wetting (dipping in water) to prevent them from absorbing moisture from mortar too quickly, which weakens the bond. However, many modern bricks have lower absorption rates and shouldn't be wetted. Concrete bricks and blocks should never be wetted. In hot, dry conditions, lightly misting brick faces helps. Follow manufacturer recommendations for your specific brick type. Over-saturated bricks cause mortar to slide and joints to fail.