Built-up Area Calculator

Calculate carpet area, built-up area, and super built-up area for residential and commercial properties. Get accurate square footage measurements for real estate planning and property valuation.

Complete Property Area Calculation

Property Length (feet):

Property Width (feet):

Wall Thickness (inches):

Common Area Percentage (%):

Balcony Area (sq ft):

Utility Area (sq ft):

Corridor/Passage (sq ft):

Property Type:

Individual Room Area Calculator

Room Length (feet):

Room Width (feet):

Room Type:

Wall Deduction (sq ft):

Built-up Multiplier:

Super Built-up Multiplier:

Area Comparison & Analysis

Carpet Area (sq ft):

Built-up Area (sq ft):

Super Built-up Area (sq ft):

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Area Efficiency & Real Estate Measurement Optimization Guide

Taxonomy Snapshot

Carpet: Net usable (habitable) footprint
Built‑up: Carpet + internal & external wall thickness + private appurtenant areas
Super Built‑up: Built‑up + proportionate common share (circulation + amenities)

Formula Core

Built‑up ≈ Carpet × (1 + WallFactor) (WallFactor typical 0.12–0.18)
Super = Built‑up × (1 + Common%) (Common% apt 20–35%, villa 5–15%)
Carpet Efficiency % = Carpet ÷ Super × 100

Benchmark Bands

Apartments: Efficiency 63–72% (≥70% strong)
Premium amenity towers: 58–65%
Villas / low‑rise: 75–85%
Commercial Grade A: 60–68%

Diagnostic Red Flags

Common share >35% without tier‑1 amenity suite
Built‑up multiplier >1.25 for standard RCC frame mid‑rise
Marketing area labels not mapping to RERA carpet disclosure

Negotiation Levers

Translate quoted Rs/super‑ft² → effective Rs/carpet‑ft² to compare inventory
Quantify amenity cost: (Super − Built‑up) × Rate = Common area premium
Efficiency uplift scenarios (plan re‑layout) for developer pitch

Data Collection Protocol

Laser measure each room (two axes) + irregular diagonals
Wall thickness sampling (≥4 points) for composite average
Validate balconies / terraces as charged or free ratio

Quick Calculator Shortcuts

Carpet from Super (apartment mid): Carpet ≈ Super × 0.67
Super from Carpet target 70% efficiency: Super ≈ Carpet ÷ 0.70

Quality / Transparency Signals

Explicit breakdown sheet (Carpet / Walls / Balcony / Common)
RERA registered plan code reference present
Variance tolerance commitment (≤±2% on handover)

FAQ

Why efficiencies differ? Core design, corridor width, amenity density.
Is balcony counted? Built‑up yes; Carpet no; jurisdiction specific for pricing.
Discrepancy at handover? Demand re‑measurement & price adjustment on delta.

Action Tip: Always normalize offers to carpet cost before comparing two projects.