Construction Calculators (Page 6)
Area, materials, paint and other construction calculations.
Duct Size Calculator
Enter airflow (m³/h), target air velocity and duct width to compute the required duct cross-section and height. For HVAC sizing and ventilation design.
Cut and Fill Calculator
Enter the grid size, number of grids and average elevation difference to estimate cut and fill volumes for earthwork balance.
Slope Stability Calculator
Enter the slope angle, soil friction angle (φ), density and height to estimate the factor of safety using the infinite-slope method for cohesionless soil, for a quick preliminary assessment.
Concrete Curing Calculator
Enter concrete volume and target age to estimate strength gain percentage and recommended curing period for site planning.
Paint Coverage Calculator
Enter the painting area, number of coats and coverage per litre to estimate the total paint needed for renovation purchasing.
Concrete Cost Calculator
Enter concrete volume and rate per m³ to estimate material cost, including pumping and wastage, for project quotes.
Labour Hours Calculator
Enter the work area and daily productivity to estimate the required man-days, helping you schedule tasks and budget labour.
Scaffold Calculator
Enter exterior wall area and scaffold levels to estimate bamboo/metal scaffold elevation coverage and approximate cost for scaffolding quotes.
Tiling Cost Calculator
Enter tiling area, tile size and price to estimate tile quantity, material cost and laying labour cost for renovation quotes.
Square Footage Calculator
Enter length and width in feet to compute rectangular area in square feet and square meters.
Concrete Calculator
Enter length, width and thickness (ft/in) to estimate concrete volume in cubic feet, cubic yards and cubic meters.
Stair Calculator
Enter total rise and preferred riser to compute the number of steps, actual riser height and total horizontal run.