Concrete Calculator — Slab, Beam and Column Volume Calculate the concrete volume for a slab, beam, column or footing, and the dry material it needs at a standard M20 (1 : 1.5 : 3) mix.
Inputs Length (feet) Width (feet) Thickness (inches) How this calculation works Volume (cu ft) = length (ft) × width (ft) × thickness (inches) ÷ 12 Volume (m³) = volume in cubic feet × 0.0283168 Cement bags at M20 = m³ × 1.54 × (1 ÷ 5.5) × 1440 ÷ 50 Example: A 20 ft × 15 ft slab that is 5 inches thick is 125 cu ft, or about 3.54 m³ of concrete — roughly 29 bags of cement at an M20 mix.
Frequently asked questions What thickness should a residential roof slab be? Typical residential RCC roof slabs in India are 4 to 6 inches thick depending on span and load. Your structural engineer's drawing is the authority for your building.
How do I convert cubic feet of concrete to cubic metres? Multiply cubic feet by 0.0283168. One cubic metre is about 35.31 cubic feet.
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An online construction materials marketplace and building-services platform operated by Aetrio Infratech Pvt. Ltd. from Bhopal, Madhya Pradesh, India.
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Bhopal, Indore, Jabalpur, Gwalior, Ujjain, Sagar, Satna and Rewa, with pan-India coverage for selected categories.
How much does house construction cost per square foot in Bhopal?
Contractor and labour work is Rs 450/sq ft basic, Rs 550/sq ft medium and Rs 650/sq ft premium, with material cost added on top.
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