Free online Carpet Area Calculator. Convert between RERA Carpet, Built-up, and Super Built-up areas using local loading factors and wall ratios.
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How to Use Carpet Area Calculator
Select your input area type: Carpet, Built-up, or Super Built-up.
Enter the area value in square feet or square meters.
Adjust wall ratios, balcony space ratios, and loading factor sliders.
View RERA carpet, net usable, and built-up splits instantly.
RERA Carpet Definition
Under the Real Estate Regulation Act, developers are legally obligated to disclose the RERA Carpet Area (net usable floor area + internal walls) so buyers pay only for private usable space.
How to compute Carpet from Built-up
Carpet Area = Built-up Area - Balcony Area - External Walls Area (typically 5-6% of flat size).
Frequently Asked Questions
How do I extract RERA carpet area from Super Built-up?
Divide the Super Built-up area by (1 + loading factor/100) to find the Built-up area, then subtract wall and balcony shares.
Is a loading factor of 30% normal?
Yes, modern high-rise apartments with wide lobbies, double lifts, and clubhouses routinely have loading factors between 25% and 35%.