Land measurement systems in East India are diverse and unique, heavily influenced by traditional practices and regional agrarian systems. Unlike other parts of the country where standard metric units dominate, states like West Bengal, Bihar, Odisha, and Assam rely on a combination of colonial and pre-colonial measurement units. Traditional units like Bigha, Katha, Dhur, Guntha, and Lecha are still used in local land registries and daily property deals.
This comprehensive East India land measurement guide details the conversion formulas, regional variations, and state benchmarks for each unit. Understanding these values is essential for verifying land deeds, calculating accurate land value, and executing property transactions without legal disputes.
East India Land Measurement System: Overview
In East India, traditional land measurement systems vary not only from state to state but also from district to district. While the standard Indian unit **Decimal (435.6 sq ft)** is common in administrative land records, regional transactions typically use local units. For instance, a **Bigha** in West Bengal is 14,400 sq ft, while in Bihar it is 27,220 sq ft, and in Assam it is 14,400 sq ft. This variance makes direct conversion between states complex and error-prone.
To avoid calculation mistakes, buyers and surveyors rely on modern conversion charts and land area calculators to translate traditional regional units into standard square feet, square yards, acres, or hectares.
Land Measurement Units in West Bengal
West Bengal's land records are digitized and managed via the official *Banglarbhumi* portal. Traditional units like Katha, Bigha, and Decimal are the standard in West Bengal's land registry. In West Bengal, a standard Bigha is fixed at 14,400 sq ft, and 1 Katha equals 720 sq ft. The unit Decimal is also widely used, with 1 Decimal equaling 435.6 sq ft (which is 1/100 of an Acre).
Key West Bengal Unit Conversions
- 1 Katha = 720 sq ft = 80 sq yd = 66.89 sq m
- 1 Bigha = 20 Katha = 14,400 sq ft = 1,600 sq yd = 1,337.8 sq m
- 1 Decimal = 435.6 sq ft = 48.4 sq yd = 40.47 sq m
- 1 Acre = 3.025 Bigha = 60.5 Katha = 100 Decimal
West Bengal Example Calculation
Land Measurement Units in Bihar
Bihar uses Bigha, Katha, and Dhur as its primary local land units. Unlike West Bengal, the size of a Bigha and Katha in Bihar varies based on the size of the *laggi* (measuring pole) used in different districts. The standard laggi ranges from 4 to 9 cubits, but the standard revenue conversion accepted is a Bigha of 27,220 sq ft, making 1 Katha equal to approximately 1,361.25 sq ft.
Standard Bihar Unit Conversions
- 1 Dhur = 68.06 sq ft = 7.56 sq yd = 6.32 sq m
- 1 Katha = 20 Dhur = 1,361.25 sq ft = 151.25 sq yd = 126.46 sq m
- 1 Bigha = 20 Katha = 27,220 sq ft = 3,024.4 sq yd = 2,528.6 sq m
- 1 Acre = 1.6 Bigha = 32 Katha = 100 Decimal
Bihar Example Calculation
Land Measurement Units in Odisha
In Odisha, agricultural land is primarily measured using Guntha, Decimal, and Acre, while urban properties are measured in square feet. In Odisha's land registry (Bhulekh Odisha), 1 Guntha is standard at 1,089 sq ft, and 40 Guntha make exactly 1 Acre. The Decimal is also extensively used, representing 1/100 of an acre (435.6 sq ft).
Key Odisha Unit Conversions
- 1 Decimal = 435.6 sq ft = 48.4 sq yd = 40.47 sq m
- 1 Guntha = 1,089 sq ft = 121 sq yd = 101.17 sq m
- 1 Acre = 40 Guntha = 100 Decimal = 43,560 sq ft
- 1 Hectare = 2.471 Acres = 247.1 Decimal
Odisha Example Calculation
Land Measurement Units in Assam
Assam uses a hierarchical traditional unit system comprising Lecha, Katha, and Bigha. In Assam, a Bigha is equivalent to 14,400 sq ft, but it is divided into 5 Kathas, making 1 Katha in Assam equal to 2,880 sq ft (different from West Bengal's 720 sq ft and Bihar's 1,361.25 sq ft). Each Katha is further divided into 20 Lechas, so 1 Lecha equals 144 sq ft.
Key Assam Unit Conversions
- 1 Lecha = 144 sq ft = 16 sq yd = 13.38 sq m
- 1 Katha = 20 Lecha = 2,880 sq ft = 320 sq yd = 267.56 sq m
- 1 Bigha = 5 Katha = 100 Lecha = 14,400 sq ft = 1,600 sq yd = 1,337.8 sq m
- 1 Acre = 3.025 Bigha = 15.125 Katha = 302.5 Lecha
Assam Example Calculation
East India Land Conversion Chart
The table below provides a quick cross-reference tool for converting traditional East Indian units to modern square feet and square meters.
| Unit Name | State | Area in Sq Ft | Area in Sq M | Acre Equivalent |
|---|---|---|---|---|
| Katha | West Bengal | 720 sq ft | 66.89 sq m | 0.0165 Acres |
| Katha | Bihar | 1,361.25 sq ft | 126.46 sq m | 0.03125 Acres |
| Katha | Assam | 2,880 sq ft | 267.56 sq m | 0.0661 Acres |
| Bigha | West Bengal / Assam | 14,400 sq ft | 1,337.8 sq m | 0.3306 Acres |
| Bigha | Bihar | 27,220 sq ft | 2,528.6 sq m | 0.625 Acres |
| Dhur | Bihar | 68.06 sq ft | 6.32 sq m | 0.00156 Acres |
| Lecha | Assam | 144 sq ft | 13.38 sq m | 0.0033 Acres |
| Guntha | Odisha | 1,089 sq ft | 101.17 sq m | 0.025 Acres |
| Decimal | All States | 435.6 sq ft | 40.47 sq m | 0.01 Acres |
How to Calculate Land Area in East India
To compute the area of a plot manually and convert it to traditional East Indian units, follow these four simple steps:
- Measure the Boundaries: Measure the length and width of the plot in feet using a standard measuring tape or electronic surveyor tool.
- Calculate Square Footage: If the plot is a perfect rectangle, multiply the Length by the Width. For irregular plots, split the area into triangles and rectangles, calculate the area of each shape, and sum them.
- Convert to Local Units: Divide the total square footage by the specific unit's square footage value. For example, if you want West Bengal Katha, divide by 720. If you want Odisha Guntha, divide by 1,089.
- Double Check with a Land Calculator: Always run the figures through an online land area calculator to avoid manual rounding errors.
State Benchmarks and Official Portals
Property verification and land record searches must always be cross-referenced with the official state portals. These digital registers provide mutation status, plot maps, and owner classification records:
- West Bengal: Banglarbhumi portal provides records of rights (ROR), mutation applications, and plot maps.
- Bihar: Bihar Bhumi portal allows users to check Jamabandi, Land ROR, and view land maps.
- Odisha: Bhulekh Odisha provides online access to ROR land records and map sheets.
- Assam: Dharitri Assam portal offers land valuation certificates, Jamabandi, and mutation tracking.
Common Mistakes in East India Land Measurement
Due to the complexity of regional units, buyers frequently make mistakes during transactions. First, assuming a "Katha" is the same everywhere is a major mistake; a Katha in Assam is four times larger than in West Bengal. Second, neglecting local measurement poles (Laggi size variation in Bihar) can lead to significant boundary errors. Third, ignoring minor decimal calculations can aggregate into substantial square footage discrepancies on large land parcels. Always double-check your title deeds and consult a registered surveyor before making payments.
How Do East Indian States Differ in Land Measurement?
This summary table provides a quick reference for all four East Indian states and their primary measurement units.
| State | Primary Units | Key Conversion | Unique Feature |
|---|---|---|---|
| West Bengal | Bigha, Katha, Decimal | 1 Katha = 720 sq ft | Decimal widely used in official records |
| Bihar | Bigha, Katha, Dhur | 1 Katha ≈ 1,361 sq ft | Dhur varies by district (≈68 sq ft) |
| Odisha | Guntha, Decimal | 1 Guntha = 1,089 sq ft | Guntha dominant for agricultural land |
| Assam | Bigha, Katha, Lecha | 1 Katha = 2,880 sq ft | Lecha (144 sq ft) unique to Assam |
For a full comparison including all Indian states, utilize our standard unit converters and online area calculators.
Frequently Asked Questions (FAQ)
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How is land measured in East India?
Land in East India is measured using traditional units — Bigha, Katha, Decimal, Dhur, Guntha, Lecha, and Kani — that vary by state, alongside modern units like square feet and acres. Decimal (435.6 sq ft) is the most uniform unit across all eastern states.
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How many square feet are in one Katha in West Bengal?
1 Katha = 720 sq ft in West Bengal. 20 Katha = 1 Bigha = 14,400 sq ft. Bihar uses a different Katha of approximately 1,361 sq ft, so always confirm the state before conversion.
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How many Decimal are in one acre?
100 Decimal = 1 acre. Since 1 Decimal = 435.6 sq ft and 1 acre = 43,560 sq ft, dividing 43,560 by 435.6 gives exactly 100 Decimal. This is standard across all East Indian states.
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What is Dhur in land measurement?
Dhur is a traditional land measurement unit used primarily in Bihar. The standard Dhur equals approximately 68 sq ft, but this can vary by district. Always confirm the local Dhur value with the revenue office before a property transaction.
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How many Bigha are in one acre in West Bengal?
1 acre = 3.025 Bigha in West Bengal. Since 1 Bigha = 14,400 sq ft and 1 acre = 43,560 sq ft, dividing 43,560 by 14,400 gives 3.025 Bigha. Use our land area converter for instant calculations.
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What is the standard size of one Guntha in Odisha?
1 Guntha = 1,089 sq ft in Odisha. 40 Guntha = 1 acre = 43,560 sq ft. Guntha is widely used for agricultural land measurement throughout Odisha and parts of neighbouring states.
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How do you convert Bigha to square feet in Assam?
Multiply Bigha by 14,400 to get square feet in Assam. Example: 2.5 Bigha × 14,400 = 36,000 sq ft. 1 Katha in Assam = 2,880 sq ft and 1 Lecha = 144 sq ft.
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What is the difference between Katha in Bihar and West Bengal?
West Bengal: 1 Katha = 720 sq ft. Bihar: 1 Katha ≈ 1,361 sq ft. This nearly double difference makes it critical to confirm the state before any property calculation. Never use Bihar Katha values for West Bengal transactions.
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How do you calculate irregular plot area in East India?
Divide the irregular plot into regular rectangles and triangles, calculate each section separately (rectangle: L × W; triangle: ½ × B × H), sum all areas, then convert to your local unit (Decimal, Katha, etc). Our land area calculator has a dedicated irregular plot mode.
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Is Decimal a standard unit across all East Indian states?
Yes, 1 Decimal = 435.6 sq ft is standard across all East Indian states — West Bengal, Bihar, Odisha, and Assam. It is the most uniform traditional unit in the region and is commonly used in official land records.
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How do you use a land area calculator for East India?
Enter the plot length and width in feet or metres, then select your target unit (Decimal, Katha, Bigha, Dhur, Guntha). The calculator converts instantly. Use the free land area calculator at landvaluetools.com/land-area-calculator/ for all East Indian units.
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What are the most common mistakes when converting East India land units?
The most common mistakes are: mixing West Bengal Katha (720 sq ft) with Bihar Katha (1,361 sq ft), ignoring district-level Dhur variations in Bihar, assuming rectangular plots when they are irregular, and not verifying local conversion values with the revenue office.
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How do you verify land measurement before buying property in East India?
Obtain a certified survey map from the Sub-Registrar's office, physically measure the plot using a laser tool, cross-check calculations with our land area calculator, and consult a property lawyer before completing the transaction.
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Why is Decimal important in East India land records?
Decimal provides a uniform measurement across all eastern states, with a fixed value of 435.6 sq ft everywhere. This makes it the preferred unit in official land registration documents, mutation records, and property certificates throughout East India.
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Which East India land unit is best for property transactions?
Decimal is the safest unit for property transactions across East India because its value (435.6 sq ft) is uniform in all states. For state-specific transactions use Katha in West Bengal and Bihar, Guntha in Odisha, and Katha or Lecha in Assam with confirmed local values.
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How to convert bigha to decimal in bihar land registry?
In the Bihar land registry, 1 Bigha is equivalent to 20 Kathas, and 1 Katha is approximately 3.125 Decimals. Therefore, to convert Bigha to Decimals in Bihar, multiply the Bigha value by 62.5 (as 1 Bigha = 62.5 Decimals).
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How many lechas are in one bigha in assam?
In Assam's land measurement system, 1 Bigha consists of exactly 100 Lechas. This is because 1 Katha contains 20 Lechas, and 1 Bigha comprises 5 Kathas (5 × 20 = 100 Lechas).
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What is the conversion factor for decimal to square meters in odisha?
In Odisha, to convert Decimals to square meters, multiply the Decimal value by 40.47. Since 1 Decimal equals 435.6 square feet, this corresponds to approximately 40.47 square meters per Decimal.
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How to calculate kani to acres in assam agricultural land?
In Assam, a Kani is traditionally equivalent to 5 Bighas or 72,000 square feet. To convert Kani to Acres, divide the Kani value by 0.605 (since 1 Acre equals 1.65 Kanis, or 43,560 sq ft divided by 72,000 sq ft).
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Is agricultural land value exempt from capital gains tax in west bengal?
In West Bengal, capital gains tax exemptions apply to rural agricultural land if it is located outside specified municipal limits and fits the criteria of 'agricultural land' under Section 2(14) of the Income Tax Act. Urban agricultural land, however, is subject to capital gains tax unless reinvested under Section 54B.
Key takeaways:
- 1 Decimal = 435.6 sq ft — the only truly uniform unit across all East Indian states
- West Bengal Katha (720 sq ft) ≠ Bihar Katha (≈1,361 sq ft) ≠ Assam Katha (2,880 sq ft)
- Dhur in Bihar is ≈ 68 sq ft but varies by district — always verify locally
- Odisha uses Guntha (1,089 sq ft); 40 Guntha = 1 acre
- Always cross-check with our land area calculator and our land area converter
- Use our ROI Calculator to evaluate if the investment makes financial sense