Concrete Slab Volume & Mix Materials Calculator (Cement Bags, Sand, Gravel)
Calculate total concrete slab volume in cubic meters (m³), required 50kg cement bags, sand and coarse gravel aggregate volumes, and water requirements with 10% waste contingency.
Calculator Inputs
Live Real-TimeTotal Concrete Volume with 10% Waste (m³)
Cement Bags Required (50kg Bags)
69.3 bags
Fine Sand Volume (m³)
4.46 m³
Coarse Gravel Volume (m³)
8.91 m³
Mixing Water (Liters)
1,732.5 L
Accurate Bill of Quantities: Structural concrete mix batching estimated with standard material tolerances.
Concrete Batching Proportions
Detailed Calculation Breakdown
Calculation Methodology
Net Volume = Length * Width * Thickness (m). Total Volume with 10% Waste = Net Volume * 1.10. Per cubic meter (350 kg/m³ mix): 7 bags cement (50kg), 0.45 m³ sand, 0.90 m³ gravel, 175L water.
Important Legal & Educational Disclaimer
This civil construction estimation tool computes standard structural concrete mix proportions.
This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.
Frequently Asked Questions
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