Land Area Converter: Gaj, Sq Ft, Decimal, Katha, Bigha, Acre — Plus Plot-to-Built-up Calculator
Convert any Indian land unit instantly — with the correct regional values for Delhi NCR, Uttar Pradesh, Haryana and Jharkhand — then see how much house fits on the plot and what it costs to build in your city.
Convert land area
Same area in every unit
Plot → built-up → construction cost
Uses the converted plot area. Ground coverage 60–75% depending on bye-laws; floors as you choose.
Why Indian land units confuse everyone — and how this converter handles it
Square feet, square metres and acres are the same everywhere. Gaj, bigha, biswa, katha and dhur are not. A bigha is 27,000 sq ft in Noida and Ghaziabad (western UP), about 27,220 sq ft in eastern UP and Bihar, only 9,072 sq ft (1,008 sq yards) in Delhi, Haryana and Punjab, and 27,225 sq ft in the Santhal Pargana division of Jharkhand. A katha is 720 sq ft in Ranchi, Hazaribagh and Giridih but 1,361 sq ft in Dhanbad, Bokaro and Bihar. The converter above therefore lists the regional unit you should pick, instead of one wrong "average". When in doubt, the number that matters legally is the one written in your sale deed, khatiyan (Jharkhand) or khasra/khatauni (UP) — read the unit there and convert from it.
Quick conversion tables
Delhi NCR & Uttar Pradesh
| Unit | Sq ft | Sq yard (gaj) | Sq m | Where used |
|---|---|---|---|---|
| 1 gaj (sq yard) | 9 | 1 | 0.836 | All of NCR — plot sizes are quoted in gaj (100, 200, 300 gaj) |
| 1 bigha (western UP) | 27,000 | 3,000 | 2,508 | Noida, Greater Noida, Ghaziabad, Meerut, Bulandshahr |
| 1 biswa (western UP) | 1,350 | 150 | 125.4 | 1/20 bigha |
| 1 bigha (Delhi / Haryana) | 9,072 | 1,008 | 843 | Delhi villages, Gurugram, Faridabad (Lal Dora & agricultural land) |
| 1 biswa (Delhi / Haryana) | 453.6 | 50.4 | 42.1 | 1/20 bigha |
| 1 kanal | 5,445 | 605 | 505.9 | Haryana, Punjab (8 kanal = 1 acre) |
| 1 marla | 272.25 | 30.25 | 25.3 | 1/20 kanal |
| 1 acre | 43,560 | 4,840 | 4,047 | Farmhouse plots, YEIDA, Sohna, Manesar |
Jharkhand & Bihar
| Unit | Sq ft | Decimal | Sq m | Where used |
|---|---|---|---|---|
| 1 decimal (dismil) | 435.6 | 1 | 40.47 | Everywhere in Jharkhand — 100 decimal = 1 acre; "5 decimal plot" = 2,178 sq ft |
| 1 katha (Ranchi belt) | 720 | 1.65 | 66.9 | Ranchi, Hazaribagh, Giridih, Ramgarh, Khunti |
| 1 dhur (Ranchi belt) | 36 | 0.083 | 3.3 | 1/20 katha |
| 1 katha (Dhanbad / Bihar) | 1,361.25 | 3.125 | 126.5 | Dhanbad, Bokaro, Deoghar, Patna, Gaya |
| 1 dhur (Bihar) | 68.06 | 0.156 | 6.3 | 1/20 katha |
| 1 bigha (Santhal Pargana) | 27,225 | 62.5 | 2,529 | Dumka, Deoghar, Godda, Sahibganj |
| 1 acre | 43,560 | 100 | 4,047 | Revenue records, farmhouse land |
Jamshedpur's Tata lease areas and Bokaro's SAIL township quote plots in sq ft or sq m directly; freehold land in Mango, Adityapur, Chas and Chira Chas is in decimal.
How much house fits on the plot?
Multiply the plot area by the ground coverage your bye-laws allow (usually 60–75% for residential plots up to 300 sq m in Noida, GNIDA, GDA, MCD, MCG and the Jharkhand municipal corporations), then by the number of floors. A 200 gaj plot (1,800 sq ft) at 65% coverage gives 1,170 sq ft per floor — a 3 BHK on each floor of a stilt + 3. A 5 decimal plot in Ranchi (2,178 sq ft) gives about 1,400 sq ft per floor — a comfortable 3 BHK duplex on G+1. FAR (floor area ratio) caps the total; the calculator above applies coverage and floors and prices the result at your city's standard rate. For the full rate table by quality see the construction cost calculator and the city guides: Noida, Greater Noida, Delhi, Gurugram, Ranchi, Jamshedpur, Dhanbad, Giridih.
Reading your land papers
- Uttar Pradesh (Bhulekh): khasra number = plot, khatauni = ownership record; area is in hectare-are-sq m (e.g. 0.0250 ha = 250 sq m = 299 gaj) on newer records and in bigha-biswa-biswansi on older ones.
- Delhi: DDA/MCD plots in sq m; Lal Dora and village land in bigha-biswa (Delhi bigha = 1,008 sq yd).
- Haryana (Jamabandi): kanal-marla; 8 kanal = 1 acre; HSVP/licensed plots in sq m or sq yd.
- Jharkhand (JharBhoomi): khatiyan and register-II give area in acre-decimal; local sale deeds add katha-dhur. Confirm which katha (720 or 1,361 sq ft) the deed uses — it changes the plot by 89%.
- Always tally: revenue record area vs sale deed area vs physical measurement by an amin/surveyor. Boundary disputes in Ranchi and Giridih usually start with a katha mismatch.
Common questions
Questions clients ask us
1 decimal me kitna square feet hota hai?
1 decimal = 435.6 sq ft = 40.47 sq m = 48.4 sq yard (gaj). 5 decimal = 2,178 sq ft; 10 decimal = 4,356 sq ft; 100 decimal = 1 acre.
1 katha me kitna square feet?
Ranchi, Hazaribagh, Giridih: 1 katha = 720 sq ft (1.65 decimal). Dhanbad, Bokaro, Bihar: 1 katha = 1,361.25 sq ft (3.125 decimal). Check which one your deed uses.
1 bigha me kitne gaj hote hain?
Western UP (Noida, Ghaziabad): 3,000 gaj (27,000 sq ft). Delhi/Haryana: 1,008 gaj (9,072 sq ft). Eastern UP/Bihar: about 3,025 gaj (27,220 sq ft).
200 gaj plot kitna square feet hai?
200 gaj = 1,800 sq ft = 167.2 sq m. At 65% coverage that is 1,170 sq ft per floor; stilt + 3 gives about 3,500 sq ft of built-up area.
1 acre me kitna decimal aur bigha?
1 acre = 100 decimal = 43,560 sq ft = 4,840 sq yd = 0.4047 hectare. In western UP 1 acre ≈ 1.61 bigha; in Delhi/Haryana 1 acre = 4.8 bigha = 8 kanal.
Gaj aur square yard me farq?
Koi farq nahi — gaj is the Hindi word for square yard: 1 gaj = 9 sq ft = 0.836 sq m.
Plot area se built-up area kaise nikalein?
Plot area × ground coverage (60–75%) × floors. FAR limits the total; check the bye-laws of your authority or ask us — the site visit is free.
Is the converter accurate for legal purposes?
The unit values are the standard revenue values for each region; but the legally binding area is what your registered sale deed and the revenue record state. Get a surveyor to physically measure before buying.
Sources
- Bigha — regional values (Wikipedia)
- Katha (unit) — Wikipedia
- UP Bhulekh — Uttar Pradesh land records
- JharBhoomi — Jharkhand land records
- Jamabandi — Haryana land records
- Delhi Land Records (DLRC)
- Bureau of Indian Standards — IS 456, NBC 2016 (coverage & FAR terminology)
Related tools
Construction cost calculator · Architect fees calculator · 2 BHK cost · 3 BHK cost · 1,000 sq ft cost
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