Mortar Calculator
Use our Mortar Calculator to determine how much mortar you need for your masonry project. Choose from different mortar types and brick sizes for accurate estimates.
How to Calculate Mortar Requirements
Calculating mortar requirements involves determining wall area, brick coverage, and mortar consumption rates. Here's a step-by-step guide.
Step 1: Calculate Wall Area
Multiply wall length by height to get total area:
- Wall Length: 20 feet
- Wall Height: 8 feet
- Wall Area: 20 x 8 = 160 square feet
Step 2: Determine Brick Coverage
Different brick sizes have different coverage rates per square foot:
- Standard bricks: 6.55 bricks per sq ft
- Modular bricks: 7.0 bricks per sq ft
- Queen bricks: 5.5 bricks per sq ft
- King bricks: 5.0 bricks per sq ft
Step 3: Calculate Mortar Bags
For our 160 sq ft wall with standard bricks:
- Bricks needed: 160 x 6.55 = 1,048 bricks
- Mortar bags: 1,048 / 35 = 30 bags (80-lb bags)
- Add 10% for waste: 30 x 1.1 = 33 bags
Cite this page as:
Daniel, P. Mortar Calculator. Available at: https://constructioncalculators.com/mortar-calculator/. Accessed: October 25, 2026.