Back to Tools
Real Estate Tool

Carpet Area Calculator

Understand your home's true usable space. Convert super built-up area to carpet area based on standard efficiency ratios for apartments, villas, and commercial spaces.

Carpet Area Calculator

Calculate usable carpet area from super built-up area

Carpet Area

840 sqft

Area Breakdown

Super Built-Up Area1200 sqft (100%)
Built-Up Area (~90%)1080 sqft (90%)
Carpet Area840 sqft (70%)
Common Area (Lost)360 sqft (30%)

Total Usable (all floors)

840 sqft

(78.0 square meters)

RERA and Carpet Area: What Homebuyers Must Know

The Real Estate (Regulation and Development) Act, 2016 (RERA) mandated that builders disclose and sell homes based on Carpet Area — the actual net usable floor area within the walls of your apartment. This excludes the thickness of walls, balconies, and common areas.

Historically, builders quoted prices based on Super Built-Up Area (which includes your share of lifts, staircases, clubhouse, etc.), making the effective per-sqft rate much higher than the sticker price suggested. RERA has changed this, but understanding the ratio is still critical for planning your interior design budget.