Carpet Area Calculator
Convert between Carpet Area, Built-up Area, and Super Built-up Area using RERA standard ratios. Know exactly how much usable space you're paying for.
Super Built-up: 1,000 sqft
Built-up: 850 sqft
Carpet: 700 sqft
700
This is what you actually use
As per RERA: Carpet area is ~70% of super built-up. Builders must quote prices on carpet area basis.
Carpet Area
700 sqft
~70% of super built-up
Built-up Area
850 sqft
~85% of super built-up
Super Built-up
1,000 sqft
Includes common areas
Carpet / Built-up / Super Built-up — indicative ratios
This result is a concept-stage calculation based on the inputs provided. It is intended as a starting point for your own research and conversations with the relevant professionals.
RERA 2016 strictly defines Carpet Area (the net usable area inside the walls of your unit). RERA does NOT fix the loading factor — the ratio between carpet and super built-up varies widely (commonly 65% to 80%) depending on the project's common areas (lobbies, lifts, stairs, club, amenities). This tool uses an industry rule-of-thumb of 70% (carpet / super) and 85% (built-up / super). Your actual ratios will be on the builder's RERA-registered cost sheet — always cross-check before booking.
Please verify final numbers with a licensed architect, structural engineer, registered surveyor, or municipal authority as relevant before any binding decision. GrehYug provides concept guidance only — not a substitute for professional advice.
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