Construction & DIY
Work out the materials a project actually needs — concrete for a slab, gravel for a base, paint for a room — with the waste factors and assumptions stated up front. Plain math you can check, not a black box.
- Construction & DIYLiveConcrete Slab CalculatorCalculate concrete for a slab: cubic yards (or m³), the number of 80-lb bags with waste, and an optional cost, from length, width, and thickness.
- Construction & DIYLiveConcrete Bags CalculatorCalculate how many bags of pre-mixed concrete you need from a volume and waste allowance. Compares 40, 60 and 80 lb bags and rounds up to whole bags.
- Construction & DIYLiveGravel / Base CalculatorCalculate gravel volume and tonnage for a driveway, base, or fill, with a compaction allowance and editable density, in tons or tonnes.
- Construction & DIYLivePaint CalculatorCalculate how many gallons of paint you need from the wall area, number of coats, and coverage rate. Deducts doors and windows and rounds up to whole gallons.