Mortar Calculator
Estimate wet mortar volume, dry material volume, cement bags, sand quantity, and water for brickwork, blockwork, plastering, or repair projects.
Add wall length, height, mortar thickness, and openings.
Select the cement-to-sand ratio and preferred units.
See mortar volume, cement bags, sand, water, and waste.
Wet mortar is based on the net wall area and mortar thickness. Dry material volume uses a 1.33 conversion factor, then cement and sand are divided according to the selected mix ratio.
Use this calculator for brick walls, block walls, repointing, rendering, plaster base coats, garden walls, small foundations, and general masonry repairs.
Results use a dry-volume factor of 1.33, cement density of 1,440 kg/m³, and an estimated water-to-cement ratio of 0.50. Site conditions and material properties may change actual usage.
How much extra mortar should I allow?
A 5% to 15% waste allowance is common. Complex layouts, uneven surfaces, and beginner work may require more.
What mix ratio should I choose?
General masonry often uses 1:4 to 1:6 cement-to-sand. Structural or specialized work should follow the project specification.
Why is dry volume higher than wet volume?
Dry ingredients contain air gaps and reduce in volume after mixing, so a conversion factor is used to estimate the required dry materials.
Results are estimates generated locally in your browser from standard geometry, material yield and waste assumptions. They are for planning purposes only, not engineering, structural, code or supplier advice. Confirm dimensions, material strength, delivery constraints and local building codes with a licensed professional before purchasing or building. VisionVix accepts no liability for decisions based on this tool's output.
This calculator provides planning estimates only. Confirm structural mixes, local codes, and final quantities with a qualified builder, engineer, or material supplier.
