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Carpet Area Calculator

Understand what you actually get when buying property in India. Convert between Super Built-up, Built-up, and Carpet Area.

Super Built-up Area1,500 sq ft
300 sq ft5,000 sq ft
Loading Factor (Common Area %)25%
10%45%
Wall Thickness (%)10%
5%20%
Price per sq ft (Super Built-up)₹6,000
₹1,000₹25,000
Carpet Area (1,080 sq ft)
Wall Area (120 sq ft)
Common Area (300 sq ft)
Super Built-up Area1,500 sq ft
Built-up Area1,200 sq ft
Carpet Area (Usable)1,080 sq ft
Space Utilization72.0%

Effective Price per sq ft

Super Built-up₹6,000/sq ft
Built-up₹7,500/sq ft
Carpet Area (what you use)₹8,333/sq ft

Total property cost: ₹90,00,000

What RERA Says

Under RERA (Real Estate Regulatory Authority), developers in India must sell properties based on carpet area — the net usable floor area excluding walls, balconies, and common areas. This protects buyers from inflated "super built-up" figures.

  • Carpet Area = Net usable area inside the apartment
  • Built-up Area = Carpet Area + wall thickness + balcony
  • Super Built-up Area = Built-up + proportionate common area (lobby, lift, stairs)