India bigha breakdown (regional variants)
Bigha is one of India's most common traditional land units, but the value varies dramatically by state. Below is the input converted into each major regional bigha.
Note: Bigha definitions can vary further at sub-district (tehsil) level. Always confirm with the local revenue office before transacting.
Real estate cost-per-unit reference (2026)
Approximate market range for the input area converted to each region's pricing convention.
Indicative 2026 ranges sourced from USDA, UK Knight Frank Farmland Index, Indian state revenue records, and Australian Property Monitors. Urban metro pricing can be 50 to 500 times these rural levels.
Comparison table: 1, 5, 10, 100 of each unit
| Unit | 1 unit | 5 units | 10 units | 100 units |
|---|
All conversions shown in square meters for cross-unit comparison.
About land units
Land area is one of the few measurement domains where the world has not converged on a single standard. The acre persists in the United States and United Kingdom; the hectare dominates the EU, Australia, Canada (officially) and most of the Commonwealth; square meters are the SI base for science and international trade; and India alone uses at least eight regional units, with bigha ranging from 1,338 m² in Bengal to 2,529 m² in Uttar Pradesh. Cross-border real estate buyers, agricultural traders, and lawyers drafting deeds across jurisdictions need fast bidirectional conversion grounded in NIST and BIPM standards.
How the math works
- Input value × unit-to-square-meter factor → universal square-meter representation. Example: 1 acre × 4,046.86 = 4,046.86 m².
- Square-meter value ÷ each target-unit's factor → converted value. Example: 4,046.86 m² ÷ 10,000 = 0.404686 hectare.
- For visual reference, the calculator picks a real-world analog (football field, rugby pitch, Central Park) within ±20% of the input size.
- India bigha uses state-specific factors: UP/Bihar 2,529 m², Bengal 1,338 m², Gujarat/Rajasthan 1,618 m². The default "Bigha" output in the main grid uses UP/Bihar as the most populous-state convention.
- Cost-per-unit references use 2026 indicative price ranges from official government and industry sources (USDA, UK Knight Frank, India revenue records).
- Numbers are displayed with smart precision: very small or very large values switch to scientific notation; mid-range values use comma-separated decimals.
History: where does an "acre" come from?
The English acre originated in medieval agriculture as the area one ox-team could plow in a single day. By the 13th century it had been standardised as 1 chain (66 ft) by 1 furlong (660 ft) = 43,560 square feet. The hectare is much younger - introduced in 1795 as part of the French metric reform, defined cleanly as 10,000 m² (one square hectometer). India's bigha dates to Mughal-era revenue records and was deliberately kept regional rather than unified during British administration, leaving the modern patchwork of state definitions.
Country usage (2026 snapshot)
| Country | Primary land unit | Secondary unit | Real-estate convention |
|---|---|---|---|
| United States | Acre | Square feet (small lots) | Residential by sq ft; rural by acre |
| United Kingdom | Hectare (official) | Acre (rural/farmland) | Farms still quoted in acres |
| India | Bigha / cent / guntha (state-specific) | Acre, hectare | Rural by bigha; urban by sq ft |
| Australia | Hectare | Square meters | Suburban by m²; rural by ha |
| Canada | Hectare (official) | Acre (still common rural) | Rural still quoted in acres |
| EU | Hectare | Square meters | Uniformly metric |
| UAE | Square feet / square meters | - | Residential in sq ft; commercial in m² |
| Singapore | Square meters | Square feet (private resale) | HDB in m²; condos quote both |
Worked example: buying 5 bigha in Lucknow, UP
A buyer is considering a 5 bigha plot in Lucknow. The seller quotes the area in UP bigha; the buyer wants to know what this means in acres, square feet, and hectares.
- 5 UP bigha = 5 × 2,529 = 12,645 square meters.
- Hectares: 12,645 / 10,000 = 1.2645 hectares.
- Acres: 12,645 / 4,046.86 = 3.125 acres.
- Square feet: 12,645 × 10.7639 = 136,108 sq ft.
- Cents: 12,645 / 40.4686 = 312.5 cents.
- Visual: roughly 3 American football fields or 1.8 international rugby fields.
Common mistakes that void real estate contracts
- Confusing UP bigha and Bengal bigha. A "5 bigha" plot can mean 12,645 m² (UP) or 6,690 m² (Bengal) - the same number describes plots that are roughly twice the size of each other. Always confirm regional definition.
- Mixing carpet area and built-up area with land area. Apartment carpet area (interior wall-to-wall) is unrelated to land area; an apartment may sit on a plot of 0.5 acre but each unit's carpet area is 1,200 sq ft. Land area applies to the plot, not the structure.
- Old English vs metric acre. The "international acre" used by NIST since 1959 is 4,046.8564224 m². The "US survey acre" used pre-1959 was 4,046.8726099 m². The difference is tiny (0.4 ppm) but matters for very large parcels (above 10,000 acres).
- Forgetting to subtract setbacks. "1 acre" of titled land does not equal 1 acre of usable area. Easements, road setbacks, environmental zones can reduce usable area by 10 to 40%.
- Assuming "hectare" means 100 × 100 meters exactly. Yes, a regular hectare is 100m × 100m, but irregular plots rarely line up that way. Always survey, do not pace.
Cross-country buyer reference cheat sheet
| Typical quote | Country | Equivalent in square meters | Equivalent in your unit |
|---|---|---|---|
| 10 acres farmland | US | 40,469 | 4.05 hectares / 25.4 UP bigha |
| 2 hectares vineyard | France/Italy | 20,000 | 4.94 acres / 7.9 UP bigha |
| 5 bigha plot | UP, India | 12,645 | 3.12 acres / 1.26 hectare |
| 3 cottah | Bengal, India | 200.7 | 0.05 acre / 2,160 sq ft |
| 10 cents | Kerala, India | 404.7 | 0.1 acre / 4,356 sq ft |
| 2,500 sq ft villa plot | Bangalore, India | 232.3 | 0.057 acre / 5.7 cents |
| 4,000 sq ft suburban lot | Sydney | 371.6 | 0.0372 hectare |
| 0.25 acre home lot | US suburb | 1,011.7 | 0.10 hectare / 10,890 sq ft |
The history of the acre vs the hectare
The acre was first standardised in the 1300s in England as the area a pair of oxen could plow in a single day - a unit defined by labor rather than geometry. It became fixed at 1 chain × 1 furlong (66 ft × 660 ft = 43,560 ft²) by Edward I's reign. The international acre was harmonised in 1959 at exactly 4,046.8564224 m² as part of the international yard and pound agreement, removing the tiny discrepancy between the British and US definitions.
The hectare arrived in 1795 via the French metric reform, defined cleanly as 10,000 m². It became the global agricultural standard because it scales naturally with metric area (1 ha = 1 hm²) and avoids the arbitrary historical conversion factors. India's bigha long predates either - it appears in Mughal revenue records from the 1600s and was deliberately kept regional by colonial administrators to avoid disrupting existing land records, leading directly to today's state-by-state variation.
The formula explained
All conversions route through square meters as the universal intermediate:
sq_m = input × factor[input_unit]
output_X = sq_m / factor[unit_X]
Factors (m² per unit):
1 acre = 4046.8564224
1 hectare = 10000
1 sq ft = 0.092903
1 sq km = 1000000
1 sq mi = 2589988.11
1 bigha (UP) = 2529
1 bigha (Bengal) = 1338
1 bigha (Gujarat) = 1618
1 cent = 40.4686
1 guntha = 101.17
These factors are taken from NIST Handbook 44 and the BIPM SI brochure, except for bigha and guntha which use the India Ministry of Land Resources' regional definitions. The acre and hectare factors are exact under the 1959 international agreement; sq ft is exact at 0.09290304 m² per ISO 31-1.
Frequently asked questions
How many hectares is 1 acre?
1 acre equals 0.404686 hectare, or about 4,046.86 square meters. Conversely, 1 hectare equals 2.47105 acres. These are the standard NIST-defined conversion factors used worldwide for land measurement.
What is 1 bigha in acres in India?
Bigha varies dramatically by state in India. 1 bigha in UP and Bihar equals 2,529 square meters (0.625 acres). 1 bigha in Bengal equals 1,338 square meters (0.331 acres). 1 bigha in Gujarat and Rajasthan equals 1,618 square meters (0.4 acres). Always confirm regional definition before buying.
Which countries use acres vs hectares?
The United States, United Kingdom, and many Commonwealth countries still use acres for real estate. Most of the EU, Australia, New Zealand, Canada (officially), and the BIPM metric system use hectares. India uses bigha, acres, and cents depending on the state. For science and international trade, hectares (or square meters) are standard.
How big is 1 hectare visually?
1 hectare equals 10,000 square meters, roughly the size of an international rugby field or about 1.4 football fields. 1 acre equals 4,047 square meters, roughly 1 American football field minus the end zones. Central Park is about 341 hectares or 843 acres.
How do I convert square feet to acres?
Divide square feet by 43,560. So 10,000 square feet equals 0.2296 acre. Multiply acres by 43,560 to get square feet. This is the standard NIST conversion factor used in US real estate.
What is 1 cent in real estate India?
1 cent equals 40.4686 square meters, or exactly 1/100 of an acre. So 100 cents equals 1 acre. The cent is widely used in South India (Kerala, Tamil Nadu, Karnataka, Andhra Pradesh) for small residential plots. 1 cent equals 435.6 square feet.
How many square meters in 1 acre?
1 acre equals exactly 4,046.8564224 square meters, conventionally rounded to 4,046.86 m². This is the international acre defined by NIST and BIPM. The historical English acre was based on 1 chain by 1 furlong (66 ft × 660 ft = 43,560 sq ft).
Is 1 guntha the same as 1 cent?
No. 1 guntha (used in Maharashtra and Karnataka) equals 101.17 square meters, while 1 cent equals 40.47 square meters. 1 guntha equals roughly 2.5 cents. 40 gunthas equal 1 acre.