12 calculator
Construction
Concrete calculator (volume & bags)
Cubic metres of concrete needed for a slab, footing or column from your dimensions. Includes a recommended waste…
Paint quantity calculator
Litres of paint required for the walls and ceiling of a room, accounting for coats and window/door openings.
Tile calculator
Flooring calculator
Roof pitch calculator
Brick calculator
Gravel volume calculator
Wallpaper roll calculator
Insulation volume calculator
Screed calculator
Rebar calculator
Roof tiles calculator
Local context: Singapore parameters
Singapore's rules are unusually flat and predictable, and Construction reflects that structure directly.
Key local facts
- Currency: Singapore dollars, S$1,234.56. GST is currently 9% and shown inclusive on most consumer prices.
- Income tax: Progressive resident rates from 0% up to 24%, with no capital gains tax and no inheritance tax.
- CPF: Mandatory CPF contributions from both employer and employee, split across Ordinary, Special and MediSave accounts by age band.
- Units: Metric — km, kg, °C, litres — with residential space quoted in square feet despite the metric norm.
- Power: 230 V / 50 Hz with Type G plugs, and installations follow SS 638.
Local examples
- Example — CBD: An employee in the CBD uses Construction to separate CPF from take-home pay before budgeting.
- Example — HDB resale: A buyer checks an HDB resale figure with Construction, keeping stamp duty as a separate calculation.
Every figure above applies to Singapore specifically and is reviewed when the rules change.