Brick & Block Calculator

How to Calculate Bricks and Blocks

Accurate brick and block calculations are essential for budgeting masonry projects, whether you're building a decorative veneer, load-bearing wall, or garden feature. The key is determining your wall area, accounting for door and window openings, and applying the material density for your chosen unit type.

Brick vs Block: Cost Comparison

Standard face bricks cost $0.40–0.70 each and yield roughly 7 per square foot, making them ideal for visible, high-end finishes. Concrete blocks are more economical at $0.80–1.50 each with the same 1.125 density per square foot, making them preferred for structural walls and utility construction. Glass blocks offer a unique aesthetic at $2–3 each. Joint thickness (3/8" vs 1/2") affects mortar usage and final appearance but not the material count significantly.

Mortar and Materials Guide

Mortar requirements depend on material type and joint thickness. Brick and glass block walls typically need 7 bags of mortar per 100 square feet (3/8" joints), while concrete block walls need only 3 bags. A 60-pound bag of mortar covers roughly 35–45 square feet depending on joint size and block density. Sand is a major expense: brick walls require about 18 cubic feet per 100 square feet, while block walls need roughly 8 cubic feet. For walls exceeding 8 feet in height or using multi-wythe construction, include wall ties spaced every 16 inches horizontally and 24 inches vertically to tie wythes together and prevent bulging.

Calculating Wall Area

Start with gross wall area: multiply wall length by wall height in feet. Then subtract all openings: each standard door opening (typically 3 feet wide × 7 feet tall) removes about 21 square feet, while a standard window (3 feet × 5 feet) removes about 15 square feet. Some estimators include lintel costs for openings wider than 6 feet. The resulting net area is what you multiply by material density to get total unit count.

Waste Factors and Ordering

Always add a waste factor to account for cutting, breakage, and irregularities. For straight walls with few openings, 5% waste is acceptable. For complex shapes, multiple colors, or challenging coursing patterns, use 10–15% waste. Wall ties should be ordered with 10–15% extra for handling and future repairs. Pallets of brick vary: standard face brick pallets hold about 500 units, while concrete blocks pack roughly 100–150 per pallet depending on size.

Tips for Successful Masonry Projects

• Order all materials at once to ensure color and texture consistency across the project
• Verify delivery: a pallet of brick weighs 3,000–4,000 lbs; ensure site access and staging area are adequate
• Check weather: mortar should not cure below 50°F or above 85°F for optimal strength
• Account for flashing, weep holes, and rebar if building structural or multi-wythe walls
• Consider sample panels: verify mortar color, bond pattern, and unit appearance before committing to full production

Common Masonry Projects

A typical 4×8-foot brick veneer (32 sq ft) needs about 224 bricks and 2.2 bags of mortar. A 20×12-foot cavity wall built with 8x8x16 concrete blocks requires 270 blocks, 1.5 bags of mortar, and 2–3 pallets. A 30-foot length of 6-foot-tall privacy fence in glass block totals 180 square feet, requiring 405 glass blocks, 7 bags of mortar, 3 pallets, and roughly $1,500 in materials depending on regional pricing.