कंक्रीट स्लैब कैलकुलेटर

सूत्र

1. Inputs ko metres mein convert karein agar ft/in ho
2. wet_volume_m³ = length × width × thickness
3. volume_cft = wet_volume_m³ × 35.3147
4. dry_volume_m³ = wet_volume_m³ × 1.54
5. cement_m³ = dry_volume × 1 / (1 + 1.5 + 3) [M20]
6. bags = cement_m³ ÷ (50/1440)
7. mid_cost = wet_volume × price_per_m³
8. cost_range = mid_cost × (1 ± 0.15)

मान्यताएँ

• Metric (m, mm) ya Imperial (ft, in) chunein — dono Indian sites par common hain।
• Slab simple rectangle hai (length × width × thickness)।
• Cement bags M20 nominal mix (1:1.5:3) maante hain; dry volume = wet × 1.54।
• Standard Indian bag 50 kg; cement bulk density ≈ 1440 kg/m³।
• Cost range ±15% around (volume × ₹/m³)।
• Dry-volume factor ke alawa extra wastage nahi — complex pours ke liye aur add karein।