Carpet vs Built-Up Area Calculator

Confused by the jargon of 'Super Built-Up' and 'Loading Factor'? Our Carpet vs Built-Up Area Calculator cuts through the noise to show you exactly how much usable space you are actually paying for.

What Is Carpet Area?

Simply put, it is the area where you can lay a carpet. It is the wall-to-wall distance inside your home.

Carpet area definition (RERA)

According to the Real Estate (Regulation and Development) Act, 2016, carpet area is the net usable floor area of an apartment. This is the only legal measurement for selling property in India now.

What is included in carpet area

• Living rooms, bedrooms, kitchen, bathrooms.
• Internal partition walls.

What is excluded from carpet area

• External walls.
• Service shafts.
• Balconies and verandahs.
• Open terraces.

What Is Built-Up Area?

Built-up area is the gross area of the flat.

Built-up area explained

It is calculated as: Carpet Area + Wall Area + Balcony Area.

Difference between carpet and built-up area

Typically, built-up area is 10-15% more than the carpet area. This extra space accounts for the thickness of the outer walls and your utility/balcony spaces.

What Is Super Built-Up Area?

This is what builders usually sell you. It is also known as the "Saleable Area".

Super built-up area explained

It includes your flat's built-up area plus a proportionate share of the building's common amenities.

Common areas included

• Lobbies and Corridors.
• Staircases and Elevators.
• Clubhouse, Gym, and Swimming Pool areas.

How Carpet vs Built-Up Area Calculator Works

This tool allows you to reverse-engineer the true value of a property.

Inputs used for calculation

• Known Area: The figure the broker/builder gave you (usually Super Built-Up).
• Loading Factor: The percentage of common area added (defaults to 25% which is industry standard).

Conversion logic explained simply

If you input 1000 sq ft Super Built-Up Area with 25% loading, the calculator strips away the "fluff" to reveal that your actual Carpet Area might only be around 700 sq ft.

Why Carpet Area Matters More Than Super Built-Up Area

You live in the carpet area, not the super built-up area. A 1500 sq ft flat with 40% loading is smaller than a 1200 sq ft flat with 15% loading. Always compare the carpet area price to find the true cost.

Typical Carpet Area Percentages in Indian Homes

Apartment vs villa comparison

• Apartments: Efficiency is usually 70-75% (Carpet Area is ~70% of Super Built-Up).
• Luxury Projects: Efficiency can drop to 60-65% due to massive amenities.
• Independent Floors/Villas: High efficiency, often 85%+.

Common Mistakes Property Buyers Make While Comparing Areas

• Assuming "Super Built-Up Area" is the size of the house.
• Not asking for the RERA Carpet Area in writing.
• Evaluating price per sq ft based on Super Built-Up Area instead of Carpet Area.

Why Use an Online Carpet vs Built-Up Area Calculator?

Builders use complex "loading factors" that are hard to calculate mentally. This tool gives you instant clarity on how much space you really get, helping you avoid overpriced "spacious" flats that are actually tiny.

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