Carpet, built-up & RERA carpet area converter

Carpet area is the net usable floor area inside your flat — the space you can actually lay a carpet on. Built-up area is the carpet area plus the thickness of the walls and features like balconies, and is usually 10 to 20 percent larger than carpet. Super built-up (or saleable) area adds a share of common spaces such as lobbies, staircases, lifts and passages, and can be 25 to 40 percent larger than carpet. Only carpet area reflects the real usable space of your home.

Under the Real Estate (Regulation and Development) Act, 2016, carpet area is defined as the net usable floor area of an apartment, excluding the area covered by external walls, areas under service shafts, exclusive balcony or verandah, and exclusive open terrace, but including the area covered by internal partition walls. Since RERA, every sale agreement must state the flat's size in this carpet area, which removes the old confusion of super built-up marketing figures. It matches the carpet area meaning used in DCPR 2034.

Historically builders quoted super built-up area because a larger number makes the rate per square foot look smaller and the flat look bigger. After RERA came into force, the legally binding size in your agreement must be the carpet area, but you may still hear built-up or super built-up figures in conversation and marketing. Always convert every offer back to carpet area before you compare, so you are comparing like with like.

One square metre equals 10.7639 square feet. To convert square feet to square metres, divide by 10.7639; to convert square metres to square feet, multiply by 10.7639. This converter shows every area in both units at the same time so you never have to do the maths by hand.