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First-pass estimate — confirm final quantities against your engineer's design.
Concrete volume
3.54m³
Cement
29bags
Sand
53cft
Aggregate
105cft
Steel (approx)
284kg
Indicative cost
₹ 38,695
Live estimate · Prices indicative for Guna district (2026)
Key points
- Steel taken at 80 kg/m³ (typical residential slab).
- Concrete mix defaults to M20 (1:1.5:3).
Formula & how it works
Volume = L × W × T (in metres).
Steel = volume × 80 kg/m³ (residential slab norm).
Worked example
- 20 × 15 × 5" slab ≈ 3.5 m³ concrete, 90 bags cement, 280 kg steel.
Expert tips & mistakes to avoid
- Always add a 5–7% wastage buffer — mid-slab shortages cost more than the buffer bags.
- For engineered members (RCC columns/beams), follow the structural drawing over any calculator.
- Order cement in tranches — bags older than 90 days lose strength.
- Confirm the current market rate on WhatsApp before finalising the budget — prices printed here are indicative only.
Frequently asked questions
Is 5 inches enough for a house slab?
+
For typical residential spans (up to ~12 ft), 4–5" is common. Longer spans need thicker slab or added beams — follow the engineer.
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