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Carpet ↔ Built-up Converter
Carpet area = usable floor space. Built-up = carpet + walls (~10-15% extra). Super built-up = built-up + common areas (~20-30% extra). RERA mandates carpet-only quoting since 2017.
Typically 10-15%
Typically 20-30%
RERA Act 2016: builders must quote carpet area only. Compare carpet ÷ super built-up to spot "loaded" quoting (lower carpet = poorer value).
FAQ
Why is my flat smaller than what I paid for?
You probably paid on super built-up. Walls (10-15%) + amenity loading (20-30%) means actual usable space is 30-40% less than the marketed number. RERA Act 2016 mandates carpet-area-only quoting since 2017.
What counts as "common amenity"?
Lobby, staircase, lift, club house, gym, swimming pool, rooftop, garden — spread across all flats by their proportional share. Higher loading = more amenities (or just inefficient layout).
Difference between built-up and saleable area?
Saleable = built-up + private balcony / private terrace. Some builders bundle balcony into built-up; check the agreement. Super built-up is built-up + amenity share.