Block Calculator | Masonry Blocks & Mortar for Walls

Masonry & Blockwork

Structural Masonry Blocks & Mortar Calculator

Calculate required hollow cement blocks, red clay bricks, and AAC autoclaved blocks, with opening deductions, mortar cement bags, and washed sand.

1 Wall & Partition Dimensions

2 Block Type & Dimensions

Preset size (length × height × thickness)

Mortar Joint Bedding Thickness (mm)

Block length (mm)

Block height (mm)

Block thickness (mm)

Breakage & Cutting Waste Factor

Price per Masonry Block Unit

Instant Results & Bill of Quantities

Block Bond Pattern & Openings Diagram 24.5 م² صافي

Total Masonry Blocks 0 بلوكة Including 10% breakage

Mortar Cement Bags 0 كيس 50كجم 0.0 m³ masonry sand

Estimated Blocks Cost 0 SAR Material cost only excluding labor

Masonry & Mortar BOQ Breakdown:

Item	Weight / Quantity	Formula & Specifications

Result type: Material Consumption Estimate

Formulas & Assumptions

Formulas used

A_net = (L × H) − Σ A_openingsNet wall area
n_per_m² = 1 / ((block_w + joint) × (block_h + joint))Blocks per square metre
N = ⌈ A_net × n_per_m² × (1 + Waste) ⌉Total blocks including waste
V_mortar = A_net × rate × 1.15Estimated mortar volume

Assumptions & reference values

Default valueDefault openings: door 1.0×2.1 m, window 1.2×1.5 m — editable.
Editable assumptionBlock size and mortar joint determine blocks per m².
Industry estimateMortar mix 1 cement : 3 sand ≈ 7.5 cement bags per m³.

Notices: This result is intended for quantity estimation. Verify quantities against approved drawings and project specifications before procurement or construction.

This calculator provides quantity and preliminary cost estimation. Structural design, material specifications and final quantities must be verified against project drawings, specifications and applicable engineering standards.