Construction Calculators (Page 5)
Area, materials, paint and other construction calculations.
Isolated Footing Volume Calculator
Enter the top and bottom sizes and height of an isolated (frustum) footing to compute concrete volume and weight for foundation batching.
Window-to-Wall Ratio Calculator
Enter the external wall area and total window area to calculate the window-to-wall ratio (%), and check it against an optional maximum allowed ratio. A Hong Kong building energy-efficiency and daylight indicator.
Stud Partition Calculator
Enter the partition length, height and stud spacing to calculate the number of vertical studs, top-and-bottom track length and the plasterboard sheets (both faces) for light-gauge steel stud partitions.
Ramp Slope Calculator
Enter the ramp length and slope percentage to calculate the fall (height difference), slope ratio and whether it meets the common accessible maximum of 1:12 (8.33%) for wheelchair ramps.
Balustrade Calculator
Enter the balustrade length and post spacing to compute the number of posts and handrail length for stairs, platforms and walkways.
Tiling Waste Calculator
Enter room length/width and tile size to estimate tile count by actual row/column layout (including edge-cut waste), more accurate than area method, for purchasing.
Skirting Calculator
Enter the room perimeter, skirting height and thickness to calculate the total skirting length and volume for accurate material estimation.
Cornice Calculator
Enter the room perimeter, cornice width and thickness to calculate the total cornice length and volume for accurate material estimation.
Fence Post Calculator
Enter the total fence length, post spacing and hole size to calculate the number of posts and the foundation concrete volume.
Pipe Flow Calculator
Enter the internal pipe diameter (mm), flow velocity (m/s) and the Hazen-Williams C value to estimate water-flow rate and head loss per 100 m for water-supply design.
Wire Size Calculator
Enter the load current, one-way length and allowed voltage drop to estimate the minimum copper cross-section by BS7671 voltage-drop method, for home and light-commercial wiring selection.
Circuit Load Calculator
Enter the number of sockets, lighting power, and equipment power to estimate circuit total load current, for selecting MCB and distribution design.