Most calculators use US units (cubic yards, 80lb bags). MixCalc uses what Indian builders actually work with: 50kg bags, cft/m³, M10–M30 grades, and ₹ pricing. 6 free tools: slab, cement bag conversion, mix ratio, sand/aggregate, plastering, and brick calculators. Every result shows its formula and exports as a PDF for your mason. No login. No ads. Built because I couldn't find one that spoke in Indian units.