Carpet Area Calculator

Free online Carpet Area Calculator. Convert between RERA Carpet, Built-up, and Super Built-up areas using local loading factors and wall ratios.

⚡ Interactive Calculation Engine Active

Please enable JavaScript in your browser to run live computations, 2D envelope diagrams, and export PDF reports.

How to Use Carpet Area Calculator

  1. Select your input area type: Carpet, Built-up, or Super Built-up.
  2. Enter the area value in square feet or square meters.
  3. Adjust wall ratios, balcony space ratios, and loading factor sliders.
  4. 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%.