Land Area Conversions: From Bigha to Sqft and Why It Matters

If you''ve ever heard two people from different states argue about how big a "bigha" is, you''ve glimpsed one of the quietest sources of confusion and dispute in Indian property. India''s traditional land measurement units evolved regionally over centuries, long before any national standard, and they were never reconciled. The result is a system where the same word means very different areas depending on where you are — sometimes even varying between districts of a single state. For a buyer, this isn''t a trivia point; it''s a real financial risk, because agreeing to buy "5 bigha" without knowing the local conversion can mean paying for far less land than you think. This guide explains the major traditional units, their state-by-state values, why legal documents insist on square feet or square metres, and how to protect yourself.

Use Ganak''s Land Area Converter to convert any traditional unit to square feet, square metres, acres, or hectares for your specific state.

Why Land Units Are So Confusing in India

The traditional units — bigha, biswa, katha, guntha, cent, ground, marla, kanal, gaj, and dozens of local variants — predate standardised metrology. Each region developed its own system based on local custom, soil type, the area a pair of oxen could plough in a day, or the seed needed to sow a plot. When the British attempted to standardise some units (West Bengal''s bigha was fixed at 14,400 sq ft under colonial rule), they did so regionally, not uniformly, so the variation persisted.

The consequence is that traditional units are locally meaningful but nationally ambiguous. A farmer in Rajasthan and a farmer in West Bengal both speak of "bigha," but they mean areas that differ by nearly two-fold. Within Uttar Pradesh, the bigha varies between western and eastern districts. This is fine when everyone in a local transaction shares the same understanding, but it becomes dangerous the moment a buyer from outside the region, a bank, or a court is involved — which is precisely when large sums are at stake.

The Bigha Problem: State by State

Bigha is the most widely used — and most variable — traditional unit, common across northern and eastern India. Here''s how dramatically it varies:

Uttar Pradesh is the cautionary extreme: the bigha there is built from "biswa" subunits, and the number of biswa per bigha differs by region. In western UP, 1 bigha is often just 5 biswa (about 6,800 sq ft); in eastern UP and the Lucknow region, it''s 20 biswa (about 27,000 sq ft) — a four-fold difference within a single state. Even the "pucca" (large) versus "kaccha" (small) bigha distinction in Rajasthan, Punjab, and Haryana can change the area by 35-50%.

The practical danger is obvious. Suppose you agree to buy "5 bigha" of land understanding it as Rajasthan pucca (136,125 sq ft), but the seller and the local record treat it as kaccha (87,120 sq ft). You''d be paying for over 49,000 sq ft of land — more than an acre — that doesn''t exist in the deal. On any meaningful per-square-foot price, that''s a difference of lakhs or crores. This is not hypothetical; mismatched bigha assumptions are a recurring source of land disputes.

The Other Regional Units

Beyond bigha, each region has its own family of units. The good news is that most of these are more standardised than bigha:

North India (Punjab, Haryana, Himachal): The marla and kanal system. 1 marla ≈ 272.25 sq ft, 20 marla = 1 kanal (5,445 sq ft), and 8 kanal = 1 acre. Biswa is also used as a bigha subunit, varying regionally.

West India (Maharashtra, Gujarat, Karnataka): The guntha. 1 guntha = 1,089 sq ft, and 40 guntha = 1 acre. This is one of the more stable units, widely used in the 7/12 land extract (satbara) records in Maharashtra.

South India (Tamil Nadu, Kerala, Andhra, Karnataka): Cent, ground, and ankanam. 1 cent = 435.6 sq ft (100 cent = 1 acre), 1 ground = 2,400 sq ft (common in Tamil Nadu, especially Chennai), and 1 ankanam = 72 sq ft (Andhra/Karnataka). Cent is especially common for residential plots in Kerala and Tamil Nadu.

East India (West Bengal, Bihar, Assam, Odisha): Katha, dhur, and decimal. Katha itself varies — 720 sq ft in West Bengal, 2,880 sq ft in Assam, and around 1,361 sq ft in parts of Bihar. 1 dhur (Bihar) ≈ 68 sq ft. Decimal is also common (1 decimal = 435.6 sq ft, the same as a cent).

Here''s a consolidated reference of the more standardised units:

The Standard Units and How They Relate

Cutting through the regional variation, four units are nationally standard and legally precise:

• Square foot (sq ft): the everyday standard for built-up property — flats, plots, carpet area. RERA mandates carpet-area pricing in sq ft (or sq m).
• Square metre (sq m): the metric standard; 1 sq m = 10.764 sq ft. Used in official documents and increasingly in urban records.
• Square yard (gaj): 1 sq yard = 9 sq ft. Common in North Indian plot sales (a "200 gaj plot" is 1,800 sq ft).
• Acre and hectare: for larger parcels. 1 acre = 43,560 sq ft; 1 hectare = 107,639 sq ft = 2.471 acres. Official land records (the revenue records that establish legal ownership) most often use hectares or acres.

The relationships worth memorising: 1 acre = 43,560 sq ft = 4,047 sq m = 0.4047 hectare. 1 hectare = 2.471 acres. And 1 sq m = 10.764 sq ft. Everything else converts through square feet as the common denominator — which is exactly why converting any traditional unit to square feet first is the safest practice.

Why Legal Documents Must Use Sq Ft or Sq M

Traditional units are fine for casual conversation but legally hazardous, which is why formal documents avoid relying on them alone. There are three reasons precision matters:

Ambiguity creates disputes. If a sale deed says "5 bigha" without a square-foot equivalent tied to the survey number, the door is open to genuine disagreement about how much land was sold — and such disputes end up in court, where the ambiguity benefits no one. A square-foot or square-metre figure is unambiguous.

RERA requires standard units. The Real Estate (Regulation and Development) Act mandates that builders price and sell on carpet area in square feet or square metres, precisely to eliminate the area-definition games that traditional and inflated units enabled. Modern apartment and plotted-development transactions are in sq ft/sq m by law.

Official records use standard units. The revenue/survey records that establish legal title — the documents a court and a bank actually rely on — record area in hectares, acres, or square metres. When your sale agreement matches the official record in standard units, your title is clean and verifiable; when it relies on a local unit, reconciling it with the record becomes an extra (and error-prone) step.

The takeaway: a traditional unit may appear in conversation or even in older documents, but the operative area in any agreement should always be stated in square feet or square metres, cross-referenced to the official survey/khata record. If a document gives only a bigha or katha figure, insist on adding the square-foot equivalent and the survey number.

Common Buyer Pitfalls

Assuming bigha means the same everywhere. The single biggest error. A buyer who knows "bigha" from one state and buys in another using that assumption can massively over- or under-estimate the land. Always confirm the local conversion.

Trusting the seller''s verbal conversion. Sellers and brokers may quote a favourable conversion. Verify independently against the official record and a reliable converter, not the counterparty''s word.

Not distinguishing pucca from kaccha bigha. In Rajasthan, Punjab, and Haryana, the "pucca" (large) and "kaccha" (small) bigha differ substantially. Confirm which applies.

Confusing carpet, built-up, and super built-up area. Separate from regional units, apartment area itself has three definitions. RERA mandates carpet area (actual usable space). Don''t conflate a super built-up figure with usable area.

Relying on the area in an old document. Older deeds may use traditional units or outdated survey figures. Reconcile against the current official record before transacting.

Ignoring the survey number. Area means little without the survey/plot number that identifies the exact parcel. The area and the survey number together define what you''re buying.

How to Protect Yourself

A few simple practices eliminate almost all area-related risk:

• Convert everything to square feet first. Whatever unit the deal is quoted in, convert it to square feet (using the correct state-specific factor) so you''re comparing and pricing on a consistent basis.
• Match the official record. Pull the revenue/survey record (the 7/12 extract in Maharashtra, the RTC in Karnataka, the khatauni in UP, and so on) and confirm the area and survey number match the deal.
• State the area in sq ft/sq m in the agreement. Ensure the sale agreement gives the area in standard units tied to the survey number, even if a traditional unit is also mentioned.
• Verify the pucca/kaccha or district variant. Where the local bigha has variants, confirm which one applies in writing.
• Use a reliable converter and, for large deals, a licensed surveyor. For significant transactions, a physical survey by a licensed surveyor confirms the actual area on the ground matches the documents.

Land is too expensive to buy on an ambiguous unit. The five minutes it takes to convert to square feet and check the official record is the cheapest insurance you''ll ever buy on a property transaction.

Frequently Asked Questions

How much is 1 bigha in square feet?

It depends entirely on the state — there is no single national value, which is the most important thing to understand about bigha. Approximate values: Madhya Pradesh and Chhattisgarh about 12,000 sq ft; West Bengal and Assam 14,400 sq ft; Gujarat and Rajasthan (kaccha) about 17,424 sq ft; Rajasthan (pucca) and Bihar about 27,225 and 27,220 sq ft respectively; Himachal Pradesh about 8,712 sq ft; and Punjab/Haryana (kaccha) around 9,070 sq ft. Uttar Pradesh is the most variable — the bigha there ranges from roughly 6,800 sq ft in western districts to about 27,000 sq ft in eastern UP and the Lucknow region, because the number of biswa per bigha differs by region. This means the same "1 bigha" can differ by nearly four times depending on location. Always confirm the specific conversion for the exact district where the land is located, and never assume the bigha value from one state applies in another — doing so can lead to massively misjudging how much land you''re actually buying.

Why does bigha vary so much across states?

Because India''s traditional land units evolved regionally over centuries, long before any national standardisation, and were never reconciled into a single system. Each region developed its own measurement based on local custom — often tied to practical things like the area a pair of oxen could plough in a day or the seed needed to sow a plot. When the British standardised some units during colonial rule (West Bengal''s bigha was fixed at 14,400 sq ft, for instance), they did so region by region rather than uniformly across India, so the variation persisted. Terrain played a role too — hilly states like Himachal Pradesh tend to have smaller bigha values, while the flat plains of states like Bihar and eastern UP have larger ones. The result is that bigha is locally meaningful but nationally ambiguous, with the same word describing very different areas in different places, and sometimes even varying between districts of a single state as with Uttar Pradesh. This is why converting to a standard unit like square feet is essential whenever a transaction crosses regional lines or involves a bank or court.

What is the difference between guntha, cent, and ground?

They''re regional units used in different parts of India, each with a fixed value. Guntha is used in western India (Maharashtra, Karnataka, Gujarat) and equals 1,089 sq ft, with 40 guntha making one acre — it appears commonly in Maharashtra''s 7/12 land records. Cent is used in southern and eastern India (Tamil Nadu, Kerala, Andhra Pradesh) and equals 435.6 sq ft, with 100 cent making one acre — it''s especially common for residential plots in Kerala and Tamil Nadu. Ground is used mainly in Tamil Nadu, particularly Chennai, and equals 2,400 sq ft — so one ground is a little under 5.5 cents, and about 18 grounds make an acre. Unlike bigha, these three units have stable, consistent values within their regions, which makes them less error-prone, though you should still convert to square feet for pricing and documentation. A quick reference: 1 cent = 435.6 sq ft, 1 guntha = 1,089 sq ft, 1 ground = 2,400 sq ft, and all of them ultimately relate back to the acre (43,560 sq ft).

Why must property documents use square feet or square metres?

For legal precision and to prevent disputes. Traditional units like bigha are ambiguous because their value varies by region, so a document that says only "5 bigha" without a square-foot equivalent leaves genuine room for disagreement about how much land was actually sold — and such ambiguity ends up in court. Square feet and square metres are unambiguous, nationally consistent units. There are three specific reasons documents use them: first, ambiguity in area creates litigation, and a precise sq ft/sq m figure eliminates it; second, the RERA Act mandates that builders price and sell on carpet area in square feet or square metres, precisely to end the area-definition games that traditional and inflated units allowed; and third, the official revenue and survey records that establish legal title record area in hectares, acres, or square metres, so stating your agreement in the same standard units keeps your title clean and verifiable against the official record. A traditional unit may still appear in conversation or older documents, but the operative area in any agreement should always be in square feet or square metres, cross-referenced to the survey number. If a document gives only a bigha or katha figure, insist on adding the precise square-foot equivalent.

How do I convert my land area to square feet correctly?

First, identify exactly which state and district the land is in, because the conversion factor — especially for bigha — depends on it. Second, check your property documents to identify the unit used (bigha, katha, guntha, cent, and so on) and, for bigha, whether it''s the pucca or kaccha variant where that distinction applies. Third, multiply the quantity by the correct state-specific conversion factor: for example, 5 bigha in West Bengal is 5 × 14,400 = 72,000 sq ft, while 5 bigha in Madhya Pradesh is 5 × 12,000 = 60,000 sq ft. Fourth, cross-check the result against the official revenue/survey record (the 7/12 extract in Maharashtra, the RTC in Karnataka, the khatauni in UP), which typically records area in hectares or acres, to confirm everything reconciles. For the standard units: 1 acre = 43,560 sq ft, 1 hectare = 107,639 sq ft, 1 sq m = 10.764 sq ft, and 1 gaj (square yard) = 9 sq ft. Using a reliable land area converter avoids arithmetic errors, and for large or high-value transactions, commissioning a physical survey by a licensed surveyor confirms the on-ground area matches the documents.

What is a gaj and how does it relate to square feet?

Gaj is the Hindi/Urdu word for square yard, a unit very commonly used in North Indian plot sales. One gaj equals 9 square feet (since a yard is 3 feet, a square yard is 3 × 3 = 9 sq ft). So a plot described as "200 gaj" is 200 × 9 = 1,800 sq ft, and a "500 gaj" plot is 4,500 sq ft. Gaj is widely used in states like Delhi, Haryana, Rajasthan, and UP for residential plots, so it''s essential to know the conversion when buying a plot quoted in gaj. It also relates to bigha — one bigha is often described as roughly 1,600 gaj (which, at 9 sq ft per gaj, is about 14,400 sq ft, matching the West Bengal/Assam bigha), though this varies with the regional bigha value. For practical purposes, just remember that gaj means square yard and multiply by 9 to get square feet. As with all traditional units, when buying a plot quoted in gaj, ensure the sale agreement also states the area in square feet or square metres tied to the survey number for legal precision.

Can wrong land unit conversion cause legal problems?

Absolutely, and it''s a recurring source of property disputes in India. If a sale agreement uses an ambiguous traditional unit like bigha without a precise square-foot equivalent, the buyer and seller can genuinely disagree about how much land was meant — for example, if one party assumes a pucca bigha (27,225 sq ft in Rajasthan) and the other a kaccha bigha (17,424 sq ft), they differ by nearly 10,000 sq ft per bigha, which on a multi-bigha deal is a substantial area and value. These disagreements frequently end up in litigation, where resolving the ambiguity is slow and costly and the outcome uncertain. Beyond disputes between buyer and seller, a mismatch between the area stated in your agreement and the area in the official survey record can cloud your title, complicate getting a home loan (banks verify area against records), and create problems when you eventually resell. The protection is straightforward: always convert to square feet using the correct state-specific factor, state the area in standard units in the agreement tied to the survey number, reconcile it against the official land record, and for large transactions commission a licensed surveyor to confirm the physical area. This eliminates the ambiguity that causes the problems.

Sources and Further Reading

This article references the regional values of traditional Indian land measurement units (bigha, katha, guntha, cent, ground, marla, kanal) and the standard units (square feet, square metres, acres, hectares) used in official land records and under the RERA Act.

• Department of Land Resources, Government of India — land records and survey framework
• UP Bhulekh — Uttar Pradesh land records (illustrating regional record systems)
• Karnataka Bhoomi / Land Records — RTC and survey records
• Maharashtra Bhulekh — 7/12 (satbara) land extracts

Last verified: 20 June 2026. Traditional land unit values vary by state and often by district within a state, and the figures here are the commonly accepted approximate conversions — local usage can differ, particularly for bigha (including pucca versus kaccha variants). Always verify the conversion applicable to the exact location of the land against the official revenue/survey record, and state areas in square feet or square metres in legal documents. This is general educational information, not legal advice.