Estimate mortar bags, volume, and mix materials for brick & block walls.
Total horizontal length
Bottom to top course
Depth of wall
Typical: 3/8"
Extra for cuts/spillage
Live 3D Wall Preview
Mortar Volume Needed—
Dry Volume (×1.33)—
60 lb Bags—
80 lb Bags—
Cement Required—
Sand Required—
Estimated Units—
With Waste (10%)—
Step 1: Enter your wall dimensions (length, height, and thickness). Step 2: Select the type of brick or block you are using, or enter custom dimensions. Step 3: Choose your mortar mix ratio (Type N is most common for general use). Step 4: Adjust the waste factor if needed (10% is standard). Step 5: View your live 3D preview and instant results. Download a PDF report to save or share.
Mortar Volume: (Wall Volume) − (Total Unit Volume) Dry Volume: Wet Volume × 1.33 (shrinkage/bulking factor) Number of Units: Wall Area ÷ (Unit Face Area with joints) Cement Volume: Dry Volume × (Cement Part ÷ Total Ratio Parts) Sand Volume: Dry Volume × (Sand Part ÷ Total Ratio Parts) Bag Count: Total Dry Volume ÷ Bag Yield (0.45 cu ft for 60lb, 0.60 cu ft for 80lb)
Type S (1:3): High compressive strength (1,800 psi). Best for below-grade walls, retaining walls, and driveways. Type N (1:4): Medium strength (750 psi). General purpose, above-grade exterior and interior load-bearing walls. Type O (1:5): Low strength (350 psi). Non-load-bearing interior walls and repointing historic masonry. Type M (1:2): Highest strength (2,500 psi). Heavy load-bearing below-grade applications (select Custom 1:2).
How much mortar do I need per brick?
Typically, 1 bag of mortar (60 lbs) will lay about 30-35 modular bricks, depending on joint thickness.
What is the difference between wet and dry volume?
Dry volume accounts for the shrinkage and bulking of sand when mixed with water. We multiply wet volume by 1.33 to get dry volume.
Why is there a waste factor?
Cutting bricks/blocks, spillage, and uneven joints consume extra mortar. A 10% waste factor is standard practice.