The brick calculator determines how many bricks and mortar bags are needed for a wall. **Wall Area** = height (ft) × length (ft) **Brick Face Area** = brick length (in) × brick height (in) **Number of Bricks** = wall area (sq in) ÷ brick face area (sq in), rounded up **Mortar Bags Estimate** = number of bricks ÷ 7.5 (standard industry ratio: ~7.5 bricks per 50-lb bag) The mortar joint (typically 3/8") is part of the effective unit spacing. The calculator divides total wall area by individual brick face area to estimate brick count. Mortar yield varies with joint thickness and application technique-the 7.5 bricks/bag ratio assumes standard 3/8" joints and standard grouting. Adjust based on your site conditions.