Volume = Length × Width × Thickness
• Cement = Volume × 7 bags/m³
• Sand = Volume × 0.42 m³/m³
• Gravel = Volume × 0.84 m³/m³
Example: For a 5m × 4m × 0.15m slab:
Volume = 3 m³
Cement = 21 bags, Sand = 1.26 m³, Gravel = 2.52 m³