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Cement Calculator for Slab Square Feet in India 2026 – Exact Cement Quantity & Cost for RCC Roof & Floor Slabs
Quickly Calculate Cement Bags for Slab Square Feet in India.
Slab Cement Calculator
Engineering accurate calculation using 1.54 Dry Volume factor and M20 grade mix.
Planning your RCC roof slab or floor slab for a G+1 house in Delhi NCR, UP, or Rajasthan? Don’t over-order cement and waste ₹20,000–₹50,000 or under-order causing delays and cracks—use our 2026 slab cement calculator to get the exact bags you need right now.
Why Accurate Cement Calculation for Slab is Critical?
Wrong cement quantity in slabs leads to weak structures, cracks, or costly rework in your dream home. In seismic zones like Uttarakhand or Bihar, precise M20/M25 mixes are non-negotiable for safety. With 2026 cement at ₹380–₹520 per 50kg bag, our calculator saves you money while ensuring strength.
Cement Calculator for Slab Square Feet – Choose Your Area & Thickness
Pick your slab area and thickness below for instant estimates (M20 grade, single span residential). Add 5-10% for wastage/beams.
4″ Thick Slab (Ground Floor)
Slab Area | Cement Bags (50kg) | Cost Range (₹380–₹520/bag) |
100 sq ft | 25–30 | ₹9,500–₹15,600 |
500 sq ft | 125–150 | ₹47,500–₹78,000 |
1000 sq ft | 250–300 | ₹95,000–₹1,56,000 |
2000 sq ft | 500–600 | ₹1,90,000–₹3,12,000 |
5″ Thick Slab (G+1 Roof)
Slab Area | Cement Bags (50kg) | Cost Range (₹380–₹520/bag) |
100 sq ft | 32–38 | ₹12,200–₹19,800 |
500 sq ft | 160–190 | ₹60,800–₹98,800 |
1000 sq ft | 320–380 | ₹1,22,000–₹1,98,000 |
2000 sq ft | 640–760 | ₹2,43,000–₹3,95,000 |
6″ Thick Slab (G+2+)
Slab Area | Cement Bags (50kg) | Cost Range (₹380–₹520/bag) |
100 sq ft | 38–45 | ₹14,400–₹23,400 |
500 sq ft | 190–225 | ₹72,200–₹1,17,000 |
1000 sq ft | 380–450 | ₹1,44,000–₹2,34,000 |
8″ Thick Slab (Special Loads)
Slab Area | Cement Bags (50kg) | Cost Range (₹380–₹520/bag) |
100 sq ft | 50–60 | ₹19,000–₹31,200 |
500 sq ft | 250–300 | ₹95,000–₹1,56,000 |
Exact Cement Consumption Formula for RCC Slab (M20 & M25)
Thumb rule: 0.25–0.45 bags per sq ft depending on thickness (4″=0.25, 5″=0.32, 6″=0.38, 8″=0.50).
Formula:
Cement bags = (Area sq ft × Thickness inches / 12 × 0.0254) m³ × 7.8 bags/m³ (M20) / 0.035.
Example (1000 sq ft, 5″ M20):
Volume = 1000 × (5/12) × 0.0254 ≈ 10.6 m³ × 7.8 bags/m³ = 320–380 bags.
For M25: Add 10% more (8.6 bags/m³).
Cement + Sand + Aggregate + Steel Quantity per Square Foot
Standard M20 mix for 5″ slab (per sq ft).
Material | Quantity per sq ft | Notes |
Cement | 0.32–0.38 bags | OPC 53 for strength |
Sand | 1.1–1.3 cu ft | River sand preferred |
Aggregate | 2.2–2.6 cu ft | 20mm + 10mm mix |
Steel | 1.0–1.2 kg | 10/8mm @8-10″ c/c |
Water | 0.45 × cement wt | For workability |
Total for 1000 sq ft: ~350 bags cement + 1200 cu ft sand + 10 tons steel.
2026 Cement Cost for Slab (PPC vs OPC)
PPC cheaper for slabs, OPC for high strength.
Type | Price per Bag | 1000 sq ft 5″ Slab Cost | Savings |
PPC | ₹380–₹450 | ₹1,22,000–₹1,71,000 | Best for non-critical |
OPC 53 | ₹450–₹520 | ₹1,62,000–₹2,09,000 | Seismic zones |
Practical Tips to Save Cement in Roof & Floor Slabs
Reduce 10-15% cement without cracks:
- Use PPC cement (better workability, less water).
- Exact M20 mix—don’t overdo cement.
- Vibrate properly to eliminate voids.
- Cure 14 days minimum (wet jute bags).
- Design optimization: Reduce spans, use drops.
Need Accurate Slab BOQ & Full House Construction Estimate?
Get professional slab BOQ tailored to your span, load, and seismic zone.
Steps:
- WhatsApp slab area, thickness, floors, location.
- Share plan/sketch.
- Receive detailed BOQ + material list in 24 hrs.
- Full house estimate optional.
WhatsApp +91 8630676890 now for slab cement calculation!
FAQ
Q1: Cement bags for 1000 sq ft 5″ slab?
A: 320–380 bags M20 grade.
Q2: M20 or M25 for residential slab?
A: M20 standard; M25 for longer spans.
Q3: Steel quantity per sq ft slab?
A: 1.0–1.2 kg/sq ft main + distribution.
Q4: Cement price 2026 Delhi NCR?
A: ₹380–₹520/50kg bag.
Q5: How to calculate slab volume?
A: Area × thickness m (e.g., 5″=0.127m).
Q6: PPC or OPC for slab?
A: PPC saves cost; OPC for early strength.
Q7: Does seismic zone affect cement?
A: Yes, Zone IV/V needs M25 +10%.
Q8: Sand for 1000 sq ft slab?
A: 1100–1300 cu ft.
Q9: Tips avoid slab cracks?
A: Proper curing, vibration, expansion joints.
Q10: Slab BOQ on WhatsApp?
A: Yes! +91 8630676890 now.