Engineered for quantity surveyors, site engineers, and contractors requiring precise material procurement estimates.
Internal & External Walls
Ceiling Plastering
Openings & Deductions
Compute gross surface areas for single or multiple walls with flexible unit switching in feet, meters, or inches.
Dedicated ceiling slab calculator tuned for thin-coat 6 mm application and smooth finish requirements.
Subtract doors, windows, and ventilators dynamically to calculate exact net plastering surface area.
Standard Plaster Mortar Ratios
Select the ideal cement to sand proportions based on exposure level, surface substrate, and structural requirements.
1:3 Cement Sand Mix
1:4 Cement Sand Mix
1:5 Cement Sand Mix
1:6 Cement Sand Mix
High-strength mortar formulated for concrete ceilings, damp proofing, and structural repair rendering.
Recommended for external walls, weather-exposed masonry, and heavy moisture protection layers.
Standard specification for internal brick walls and blockwork requiring high durability and smooth finishing.
Economical mortar option for internal partition walls, smooth internal plaster, and low-stress surface coats.
Calculation Workflow & Conversion
Net Surface Area
Wet to Dry Volume
Cement Bag Breakdown
Wastage & Final Cost
Multiply wall length by height across all structural elements, then deduct combined door and window opening areas.
Convert net wet plaster volume into dry mortar volume using an expansion factor of 1.30 to 1.35 to offset sand voids.
Apply standard cement bulk density of 1440 kg/m³ to convert required volume into standard 50 kg cement bags.
Incorporate 5% to 10% rebound wastage factor to calculate total sand tonnage, CFT volume, and cost total.