Block Masonry Calculator

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Select Units

Select Block Size

Block sizes shown in inches when 'Feet' selected and in meters when 'Meter' selected.

Enter Length

Enter Height

Enter wall thickness

Mortar percentage (of masonry volume)

Default 15% (you may change to local practice)

Mix (cement : sand)

Default 1 : 4

Cement bag weight (kg)

Default 50 kg

Notes: Block volumes are calculated using block dimensions including mortar joint thickness (Option B). Mortar % applies to masonry volume. Cement: density assumed 1440 kg/m³. 1 m³ = 35.3147 ft³.