Carpet vs Built-up Area Converter
Convert between carpet area, built-up area, and super built-up area. Understand what you are actually buying.
Convert Area Type
Enter area value and select conversion type.
Standard loading: 10–15% for walls and internal areas
How It Works
Select area type
Choose whether you are converting from carpet, built-up, or super built-up area.
Enter area value
Input the area in sq.ft. Adjust loading factor if your builder uses a non-standard rate.
Compare all three
See carpet, built-up, and super built-up areas side by side to understand what you are paying for.
Converted Value
Carpet Area → Built-up Area
All Three Areas
What This Means
Built-up Area = Carpet Area × (1 + 10%) = Includes walls + balcony (if applicable)
Carpet Area: Net usable area inside the apartment walls. This is what you actually live in.
Built-up Area: Carpet area + walls + balcony. Typically 10–15% more than carpet area.
Super Built-up Area: Built-up area + proportionate share of common areas (lifts, lobbies, clubhouse). Typically 15–25% more than built-up area.
Why This Matters
- • Builders often quote super built-up area to make the apartment seem larger
- • RERA mandates that carpet area must be the basis for pricing
- • Always compare prices per sq.ft of carpet area, not super built-up
- • A 1000 sq.ft super built-up apartment may be only 800 sq.ft carpet — a 20% difference
Frequently Asked Questions
Learn about area measurement in Indian real estate.
What is carpet area?
Carpet area is the net usable area within the apartment walls. It excludes walls, balconies, terraces, and common areas. RERA defines carpet area as the area measured from the inner side of the walls.
What is built-up area?
Built-up area = carpet area + area occupied by walls + balcony/verge area. Typically 10–15% more than carpet area. Loading factor varies by builder and location.
What is super built-up area?
Super built-up area = built-up area + proportionate share of common areas (lifts, lobbies, staircases, clubhouse, etc.). Typically 15–25% more than built-up area. Builders often quote this to make apartments seem larger.
Which area should I compare when buying a flat?
Always compare per sq.ft price based on carpet area. RERA requires builders to quote prices per sq.ft of carpet area. If a builder quotes super built-up area, ask for the carpet area equivalent.
What is loading factor?
Loading factor is the percentage by which built-up or super built-up area exceeds carpet area. Typical loading: 10–15% for built-up, 25–40% for super built-up. High loading means you are paying for areas you don't exclusively own.
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Frequently Asked Questions about Carpet vs Built-up Area Converter
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