Calculate RERA carpet area and the real price of usable space.
Convert between RERA carpet area, usable carpet, built-up area, super built-up area, and builder brochure area. Check loading, balcony area, and effective carpet price for Bengaluru apartments.
RERA carpet includes internal partition walls
External walls, columns, ducts, and structural area estimate
Typical: 20-30% (lobby, stairs, corridors)
Excluded from RERA carpet; often shown separately in brochures
RERA Carpet
1,000
sq ft
Built-up
1,100
sq ft
Super Built-up
1,375
sq ft
Usable Carpet
962
sq ft approx.
Brochure Area
1,455
sq ft incl. exclusive area
Effective Price per Sq Ft (RERA Carpet)
₹11,000
vs ₹8,000/sqft quoted (super built-up)
Super built-up loading over RERA carpet: 38%
Approx. usable carpet rate: ₹11,440/sqft
Balcony, utility, verandah, and open terrace areas are tracked separately because they are excluded from RERA carpet area.
RERA carpet area excludes external walls, service shafts, exclusive balcony/verandah/open terrace, and includes internal partition walls. Always verify the RERA-registered area before comparing prices.
What is RERA Carpet Area, Usable Carpet Area, Built-up Area, and Super Built-up Area?
RERA carpet area is the net usable floor area of an apartment excluding external walls, service shafts, exclusive balcony/verandah/open terrace, and including internal partition walls. Usable carpet area is a practical buyer estimate after removing internal partition-wall share. Built-up area adds external/structural loading, while super built-up area adds your share of common areas like lobbies, staircases, corridors, gym, and clubhouse.
RERA and Carpet Area in India
Since RERA (Real Estate Regulation Act, 2016), buyers should compare the RERA-registered carpet area instead of relying only on super built-up or saleable-area claims. This protects buyers from inflated area comparisons. When a builder quotes ₹8,000/sqft on super built-up, the effective RERA carpet area rate can be much higher. Always compare properties on RERA carpet area and verify the figure in the project's RERA filing, sanctioned plan, agreement, and final possession documents.
Bangalore apartment buying check
Compare properties on RERA carpet area, not only brochure area.
Bengaluru apartment listings may mention carpet area, RERA carpet area, built-up area, super built-up area, or saleable area depending on the builder, resale seller, or portal. If two flats show the same price per square foot but different loading, the actual RERA-carpet cost can be very different.
Use this calculator while comparing flats in Whitefield, Sarjapur Road, Electronic City, Hebbal, Yelahanka, Jayanagar, and other Bengaluru micro-markets where amenity loading, balcony area, and common-area allocation can vary by project.
Formula reminder
RERA carpet area includes internal partition walls but excludes external walls, service shafts, exclusive balcony/verandah/open terrace, and common areas. For buyer comparison, effective price on RERA carpet area is usually the clearest number.
Frequently
Asked Questions
Common questions answered to help you make better property decisions.
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