Carpet Area Calculator
Calculate total usable floor area with room breakdown and price estimation.
Room Details
Explore More Construction Tools
What is a Carpet Area Calculator?
A Carpet Area Calculator computes the total usable floor space of a property by summing individual room dimensions. It helps you understand your actual living space versus what builders advertise as built-up or super built-up area.
Under RERA (Real Estate Regulation Act), property prices must be based on carpet area. This calculator helps you verify builder claims, compare properties, and estimate actual usable space from super built-up figures.
Our tool supports property presets (1BHK, 2BHK, 3BHK), converts between sq.ft, sq.m, and sq.yards (gaj), and estimates property value based on rate per sq.ft.
Property Presets
Quick setup for 1BHK, 2BHK, 3BHK, and Office spaces with typical room configurations.
Area Comparison
See carpet vs built-up vs super built-up estimates to understand what you're paying for.
Unit Conversion
Convert between sq.ft, sq.m, and sq.yards (gaj) instantly.
Price Estimation
Enter rate per sq.ft to get total property value estimate.
How to Calculate Carpet Area
Select Property Type
Use presets for standard configurations or add rooms manually.
Enter Dimensions
Input length × width for each room. Measure wall-to-wall internally.
View Results
See carpet area, built-up estimate, and unit conversions.
Calculate Price
Enable price estimation, enter rate/sq.ft to get total value.
Area Types Comparison
| Area Type | Includes | Excludes | Typical % |
|---|---|---|---|
| Carpet Area | Rooms, kitchen, bathrooms | All walls, balcony, common | 100% |
| Built-up Area | Carpet + internal walls + balcony | External walls, common areas | 110-120% |
| Super Built-up | Built-up + proportionate common | Nothing | 130-145% |
* Percentages relative to carpet area. Actual ratio varies by builder and project design.
Included in Carpet Area
- All bedrooms and living rooms
- Kitchen and dining area
- Bathrooms and toilets
- Store room and utility space
- Passages within the flat
Excluded from Carpet Area
- External (outer) walls
- Balconies and terraces
- Lobby, staircase, lift area
- Common corridors and passages
- Parking and basements
Pro Tips for Home Buyers
Always ask for carpet area - It's your actual usable space.
Calculate loading factor - Lower loading = better value for money.
Compare on carpet area - Not super built-up which includes common areas.
Verify measurements - Measure actual rooms before final payment.
Check RERA registration - Ensures pricing on carpet area.
Include balcony separately - It's part of built-up, not carpet.
Common Use Cases
Flat Purchase
Calculate actual usable space from builder's super built-up claims.
Property Comparison
Compare multiple properties on carpet area for fair evaluation.
Rent Calculation
Base rent on actual carpet area for fair pricing.
Frequently Asked Questions
What is carpet area?
Carpet area is the actual usable floor area inside an apartment - where you can lay a carpet. It includes bedrooms, living room, kitchen, bathrooms but excludes external walls, balconies, common areas. RERA mandates property pricing based on carpet area.
What is the difference between carpet area and built-up area?
Carpet area: Usable floor space inside walls. Built-up area: Carpet area + internal walls + balcony. Built-up is typically 10-20% more than carpet area. Super built-up includes common areas (lobby, stairs, lift) and is 25-40% more than carpet area.
How to calculate carpet area from super built-up?
Rule of thumb: Carpet Area ≈ 70% of Super Built-up Area. For a 1000 sq.ft super built-up flat, expect ~700 sq.ft carpet area. This ratio varies by builder (60-75%). Always ask for exact carpet area measurement.
What is loading factor in real estate?
Loading factor is the percentage difference between super built-up and carpet area. Formula: Loading = (Super Built-up - Carpet) / Carpet × 100. A 25% loading means for 1000 sq.ft carpet, you pay for 1250 sq.ft super built-up. Lower loading is better for buyers.
How many sq yards (gaj) in 1 sq ft?
1 sq yard = 9 sq ft. So to convert sq.ft to sq.yd: divide by 9. Example: 900 sq.ft = 100 sq.yd (gaj). In North India, 'gaj' is commonly used for land measurement.
What is typical carpet area for 2BHK flat?
A standard 2BHK has 650-850 sq.ft carpet area. This includes: Living (150-200), Master Bedroom (150-180), Bedroom 2 (120-150), Kitchen (80-100), Bathrooms (60-80), Passage (40-60). Premium 2BHKs may have 900-1100 sq.ft.
Should I buy based on carpet or super built-up area?
Always compare on carpet area - it's what you actually get to use. RERA now mandates pricing on carpet area. If builder quotes super built-up, ask for carpet area and calculate the loading factor. Lower loading = better value.
Does carpet area include balcony?
No, traditional carpet area excludes balcony, terrace, and verandah. RERA definition includes usable enclosed spaces. Some builders count enclosed balconies at 50%. Open balconies are part of built-up but not carpet area.
How to measure carpet area of a room?
Measure the internal length and width of each room (wall-to-wall, not including wall thickness). Area = Length × Width. For irregular rooms, divide into rectangles, calculate each, and sum. Use our calculator to add multiple rooms.
What RERA says about carpet area?
RERA (Real Estate Regulation Act) mandates: (1) Carpet area must be clearly disclosed, (2) Pricing must be based on carpet area, (3) Carpet area definition: net usable floor area excluding external walls, service shafts, exclusive balcony. This protects buyers from inflated super built-up pricing.