Construction Calculators (Page 3)
Area, materials, paint and other construction calculations.
Suspended Ceiling Calculator
Enter room length and width with grid spacing to compute ceiling area and total main and cross runner length for lightweight steel-frame ceilings.
Slab Self-Weight Calculator
Enter slab thickness and concrete density to compute the slab self-weight per area (kg/m²) and distributed load (kN/m²) for preliminary structural dead-load assessment.
Retaining Wall Volume Calculator
Select a rectangular or trapezoidal section, enter base/top width, height and length to compute retaining wall concrete volume and weight for foundation and landscape works.
Brick Wall Calculator
Enter brick wall length, height, thickness and brick size with mortar joint to compute wall volume, total bricks and mortar volume for quantity takeoff and pricing.
Asphalt Volume Calculator
Enter the pavement area and asphalt layer thickness to estimate asphalt mix volume and weight (tonnes) for roads, parking lots, and roof waterproofing.
Plot Ratio Calculator
Enter the site area and gross floor area to calculate the plot ratio (GFA ÷ site area) and check it against an optional maximum allowed ratio. A core Hong Kong planning density indicator.
Site Coverage Calculator
Enter the site area and building footprint to calculate the site coverage (footprint ÷ site area × 100%) and check it against an optional maximum allowed coverage. A Hong Kong planning density control indicator.
Beam Self-Weight Calculator
Enter beam width, height and concrete density to compute the cross-section area and self-weight line load (kg/m, kN/m) for structural dead-load and reinforcement estimates.
Tile Adhesive Calculator
Enter the tiling area and adhesive bed thickness (thin-set 3–5 mm) to calculate the tile adhesive (thin-set mortar) volume and weight for home or site tiling.
Column Self-Weight Calculator
Enter column width, depth, height, and concrete density to compute concrete volume, self-weight (t), and axial compression (kN), for structural dead load and capacity evaluation.
Wall Load Calculator
Enter the wall thickness, height and material density to calculate the self-weight per metre (kg/m) and line load (kN/m) for brick and concrete walls, for structural dead-load and foundation assessment.
Roof Area Calculator
Enter the horizontal plan area and slope (%) to compute the actual sloped roof area and slope angle for tiles, waterproofing and roofing material takeoff.