The Complete Guide to Land Area Units: Dismil, Hectare, Acre, Bigha & More
Land area measurement is one of the most practically critical calculations in everyday life — from buying a plot to filing land records, from agricultural planning to property valuation. This guide decodes every major land unit used across South Asia and the world.
What Is Dismil (Decimal)? The Land Unit of South Asia
Dismil, also written as "Decimal" and sometimes spelled "Desimal," is a traditional unit of land measurement predominantly used in the Indian states of Bihar, Jharkhand, West Bengal, Assam, Odisha, and throughout Bangladesh. The word "Dismil" is a local pronunciation and spelling of "Decimal" — and the unit is mathematically straightforward: 1 Dismil = 1/100th of an Acre, or equivalently, 435.6 square feet or approximately 40.47 square meters.
The unit has its origins in the British colonial survey system, when the acre was adopted as the standard land measurement unit across British India. Local populations adopted "Decimal" as a practical subdivision of the acre — 100 decimals make exactly one acre, making it an easy unit to work with for smallholding farmers and rural land registries. Over generations, the pronunciation evolved regionally: "Decimal" became "Dismil" in Bihar and West Bengal, "Desimal" in Bangladesh, and "Gunta" in parts of Karnataka (though the Gunta is slightly different in precise value).
Today, Dismil remains the dominant unit of land measurement in land revenue records, sale deeds, and agricultural surveys across eastern India and Bangladesh. Despite the government of India promoting metric units (particularly the Hectare for agricultural land), Dismil persists because of its deep integration into regional land registry systems, rural oral tradition, and the practical familiarity of local farmers and landholders.
How the Land Area Converter Works
Our converter uses a base-unit approach: every land area unit is stored as its precise equivalent in square meters — the internationally standardized SI unit of area. All conversions route through this common base, ensuring mathematical accuracy across every combination of input and output units.
Step 1: Normalize to Square Meters
When you enter a value in any unit (say, 50 Dismil), the converter multiplies it by that unit's square meter equivalent (50 × 40.4686 = 2,023.43 m²). This normalized value is the calculation anchor — precise, internationally recognized, and unambiguous.
Step 2: Divide by Target Unit
To get the value in any target unit, the square meter base is divided by the target unit's square meter equivalent. For example, to convert to Hectares: 2,023.43 ÷ 10,000 = 0.2023 Hectares. The same base value converts to all units simultaneously with a single division per unit.
Precision Handling
Results are rounded appropriately based on the magnitude of the output value — very small values get more decimal places, very large values get fewer. The raw formula is always shown, allowing verification against manual calculations. All conversions use the most precise internationally published conversion factors available.
Regional Variant Awareness
Several South Asian land units (particularly Bigha and Katha) have different values in different states and regions. Our reference table notes these regional variations clearly, and the converter uses the most commonly applied national standard values, with region-specific notes where relevant.
The Hectare: The International Standard for Agricultural Land
The Hectare (symbol: ha) is the primary land area unit used in the international metric system for agricultural and land measurement purposes. It is not technically an SI unit (the SI unit of area is the square meter), but it is accepted for use within the SI system and is endorsed by the International Committee for Weights and Measures (CIPM) as a practical non-SI unit for land measurement.
One Hectare = 10,000 square meters = 100 Ares = 2.471 Acres = 247.105 Dismil. In practical terms, a Hectare is a square with sides of 100 meters — roughly the size of a standard international football (soccer) pitch including surrounding run-off area. The Hectare is used in land registration, agricultural statistics, forestry records, and urban planning across Europe, Australia, Canada, Africa, and Asia.
Hectare in India
The Government of India officially adopted Hectares for agricultural land records under the Metric System of Weights and Measures Act. However, regional units (Bigha, Dismil, Katha, Guntha) remain deeply entrenched in practical use, creating a persistent need for accurate conversion tools like this one.
Hectare in Bangladesh
Bangladesh uses both Dismil (Decimal) and Hectare in land records. The official land registration system records areas in Dismil (katha/bigha system) while agricultural statistics and government land surveys use Hectares. Conversion fluency is essential for anyone working with Bangladeshi land records.
All Supported Land Area Units: Definitions & Exact Values
Our converter supports 18 land area units spanning global metric, imperial, and traditional South Asian measurement systems. Here are the most important ones with their precise definitions:
🌿 Dismil / Decimal
= 40.4686 m² = 435.6 ft² = 0.01 Acre
Used in Bihar, Jharkhand, West Bengal, Bangladesh. 100 Dismil = 1 Acre. Also called "Decimal" in official records.
🌍 Hectare (ha)
= 10,000 m² = 107,639 ft² = 2.471 Acres
International metric unit for land. Used in government land records worldwide. 100 Hectares = 1 km².
🌾 Acre
= 4,046.86 m² = 43,560 ft² = 100 Dismil
Imperial unit, widely used in USA, UK, India, Bangladesh. Standard for farm land transactions across South Asia.
🏡 Bigha
≈ 1,337–2,529 m² (varies by region)
Traditional unit used across North India, Bangladesh, Nepal. Value varies significantly: Pucca Bigha (1 Acre = 3 Bigha), Kaccha Bigha (smaller). Our converter uses standard Bigha = 2,529.29 m².
🌱 Katha
= 66.89 m² = 720 ft² (varies by region)
Subdivision of Bigha. 20 Katha = 1 Bigha in Bangladesh. Used in Bihar, West Bengal, Bangladesh, Assam. One of the most common units for small urban plots.
🟩 Square Feet (sq ft)
= 0.0929 m²
The dominant unit for property and urban land measurement in India, Pakistan, Bangladesh, USA. All builders, developers, and real estate agents quote prices per square foot.
🔷 Square Meter (m²)
= 10.764 sq ft = 0.0001 Hectare
The SI base unit for area. Used in government land records, architectural drawings, and international property listings. Europe primarily quotes land in m².
🌺 Cent
= 40.4686 m² = 435.6 ft²
Identical in value to Dismil/Decimal. Primarily used in South India — Tamil Nadu, Kerala, Karnataka, Andhra Pradesh. 100 Cents = 1 Acre.
🏘️ Guntha / Gunta
= 101.17 m² = 1,089 ft² = 2.5 Dismil
Used in Maharashtra, Karnataka, Andhra Pradesh, Gujarat. 40 Guntha = 1 Acre. Common for small agricultural plots and rural land transactions.
🏘️ Marla
= 25.29 m² = 272.25 ft²
Used primarily in Pakistan, parts of Punjab (India). 20 Marla = 1 Kanal. Standard for residential plots in Pakistani cities like Lahore, Karachi, Islamabad.
🏙️ Kanal
= 505.86 m² = 5,445 ft²
Used in Pakistan, Punjab (India), and Kashmir. 8 Kanal = 1 Acre. A common unit for medium-sized plots in Pakistani cities and Punjabi agricultural transactions.
📐 Square Yard
= 0.836 m² = 9 sq ft
Used in property descriptions in India, Pakistan, UK. Often appears in older land documents and some state-level property registrations alongside metric or imperial units.
South Asian Land Units: Regional Variations & Historical Context
The complexity of South Asian land measurement stems from centuries of parallel systems — Mughal administrative units, British colonial survey systems, and deeply local traditional units that predate both. Understanding these regional variations is essential for correctly reading land records across different states and countries.
Bihar & Jharkhand
Primary units: Dismil, Katha, Bigha, Acre. The official land registry uses Dismil extensively. 1 Bigha = 20 Katha = 100 Dismil in these states. Property records (Jamabandi) are maintained in Dismil at the sub-divisional level.
West Bengal & Bangladesh
Primary units: Bigha, Katha, Chatak, Dismil. 1 Bigha = 20 Katha = 160 Chatak in Bangladesh. The decimal (Dismil) system is used for smaller plots. Bangladesh government land records (Khatian) use these units with Hectare equivalents also stated.
South India (TN, Kerala, AP, KA)
Primary units: Cent (= Dismil), Acre, Guntha/Gunta, Ground (in Tamil Nadu = 2,400 sq ft). The Ground is a distinctive Tamil Nadu unit used for urban plots. 100 Cent = 1 Acre = 40 Guntha. Village administrative map documents (Adangal, Pahani) use Acres and Cents.
North India & Rajasthan
Primary units: Bigha, Biswa, Biswansi, Hectare. Values vary dramatically: 1 Bigha in UP = 2,529 m² while 1 Pucca Bigha in Punjab = 4,047 m². Rajasthan uses Bigha (1 Bigha = 2,500 m²). Always verify state-specific Bigha values when reading North Indian land records.
Who Benefits from a Land Area Converter?
Land area conversion is relevant to anyone involved in property transactions, agricultural planning, government land administration, or rural development — a surprisingly large portion of the population in South Asia and other regions with traditional land measurement systems.
✔ Property Buyers & Sellers
Real estate transactions in South Asia routinely involve multiple unit systems — a seller quotes in Katha, the registry records in Dismil, the bank valuation report uses Square Feet, and the legal title deed uses Acres. Converting instantly between all of these eliminates confusion and potential fraud in land transactions.
✔ Farmers & Agricultural Workers
Government agricultural schemes, crop insurance programs, and subsidy applications often require land area in Hectares, while farmers know their land area in Bigha or Dismil. Converting accurately ensures farmers receive correct benefits and properly characterize their holdings in official government applications.
✔ Land Revenue Officers
Revenue department officials handling land mutation, partition, and registration need to convert between the units used in historical land records (Bigha, Katha, Dismil) and the metric units (Hectare, Square Meter) required by modern government land information systems and national GIS databases.
✔ Surveyors & Civil Engineers
Land surveyors, civil engineers, and urban planners working in South Asian cities regularly need to convert between dimensions (feet, meters) and area units (Square Feet, Square Meters, Dismil, Hectare) when preparing survey maps, subdivision layouts, and development approval drawings.
Essential Conversion Relationships Every Land Owner Should Know
These are the conversion ratios used daily across South Asian real estate markets. Memorizing even a few of the most common ones will save you time and prevent costly misunderstandings.
Dismil (Decimal) Relationships
- 1 Dismil = 435.6 sq ft
- 1 Dismil = 40.47 sq meters
- 1 Dismil = 0.01 Acre
- 1 Dismil = 0.004047 Hectare
- 100 Dismil = 1 Acre
- 247.1 Dismil = 1 Hectare
Hectare Relationships
- 1 Hectare = 10,000 sq meters
- 1 Hectare = 107,639 sq feet
- 1 Hectare = 2.471 Acres
- 1 Hectare = 247.1 Dismil
- 1 Hectare = 3.954 Bigha
- 1 Hectare = 100 Ares
Key Features of Our Advanced Land Area Converter
Five specialist tools covering every aspect of land area conversion — from quick single-unit conversion to full multi-unit tables, visual comparisons, and plot dimension calculations.
18 Land Area Units
Supports Dismil, Hectare, Acre, Bigha, Katha, Chatak, Square Feet, Square Meter, Square Yard, Cent, Guntha, Marla, Kanal, Are, Square Kilometer, Square Mile, Ground (Tamil Nadu), and Biswa — covering every major land unit used across South Asia, the UK, USA, and globally.
Plot Dimension Calculator
Enter plot length and width in feet, meters, yards, inches, or centimeters to calculate the plot area and instantly convert to all land units. A visual scaled plot diagram shows the proportional shape of your land. Perfect for builders, architects, and property buyers evaluating plot layouts.
100% Private & Free
All conversions happen entirely in your browser — no data is ever sent to any server. Your land area figures, which may be sensitive financial or legal information, stay completely on your device. Works fully offline after the initial page load. No registration, no subscription, no daily limits.
Visual Comparison Mode
The Compare tab visualizes your land area relative to familiar real-world references — football fields, cricket grounds, Olympic swimming pools, city blocks, and more. This transforms abstract area numbers into intuitive spatial understanding, making it easier to evaluate whether a plot size is appropriate for your intended use.
Pro Tips for Accurate Land Area Conversion
Bigha is the most dangerous unit in South Asian land transactions because its value varies dramatically between states. A Pucca Bigha in Punjab is 4,047 m² (= 1 Acre), while a Kaccha Bigha in UP is only about 1,337 m². Before accepting any Bigha-quoted price, confirm the exact state and local definition being used. Our reference table shows the most widely accepted national standard, but always cross-check for your specific region.
Many land disputes arise from discrepancies between the stated area and the actual measured dimensions. If a sale deed says "30 × 60 feet = 2 Katha," enter those dimensions in the Plot Calculator and verify whether 1,800 sq ft actually equals 2 Katha in your local system. This simple check can catch errors before you sign any document.
When converting land areas for official documents, loan applications, or insurance purposes, use the Download button to save a text record of your conversion showing all units simultaneously. This creates a reference document that can be attached to applications or kept on file, preventing the need to re-convert later and providing an audit trail for your calculations.
All central government agricultural schemes in India (PM-KISAN, crop insurance, soil health cards) officially require land area in Hectares. Even if your land records are in Bigha or Dismil, you must convert to Hectares for central government applications. Use the "All Units" tab to get your Hectare equivalent immediately, then cross-check with your local patwari's records.
Frequently Asked Questions
Conclusion
Land area measurement sits at the intersection of legal rights, financial value, agricultural livelihoods, and cultural heritage. From a farmer in Bihar measuring his plot in Dismil to a developer in Mumbai quoting prices per Square Foot, from a government official recording land in Hectares to a buyer in Lahore evaluating a plot in Marla — accurate unit conversion is not a convenience, it's a necessity. Our Dismil to Hectare Land Area Converter delivers that accuracy instantly, across 18 units, with a visual plot calculator, real-world comparison mode, and a complete reference table — all free, all private, and all in your browser.
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