Land measurement in East India uses several traditional units that vary from state to state. Regions like West Bengal, Bihar, Odisha and Assam follow local systems such as Bigha, Katha, Decimal, Dhur and Kani. Because these units are different from standard square feet and acre measurements, many property buyers and farmers find it difficult to calculate land area correctly.
This East India land measurement guide explains how land is measured across eastern states and how to convert traditional units into square feet, acre and hectare. Whether you are buying land, selling property or calculating agricultural area, understanding these land measurement units is essential. We also provide conversion charts, formulas and examples so you can calculate plot size accurately using a land area calculator.
Featured Snippet: Key East India Land Units
Essential land measurement conversions in East India:
- 1 Decimal = 435.6 sq ft (Standard across Eastern states)
- 1 Katha (West Bengal) = 720 sq ft
- 1 Bigha (West Bengal) = 20 Katha = 14,400 sq ft
- 1 Dhur (Bihar) ≈ 68 sq ft (varies by district)
- 1 Guntha (Odisha) = 1,089 sq ft
Basic calculation formula:
Land area = Length × Width
Use our free land area calculator for accurate plot size calculation and unit conversion across all East Indian states.
What is the Land Measurement System in East India?
India uses both modern metric units and traditional land measurement systems. In East India, traditional units are still widely used for rural and agricultural land.
Common land units include:
- Bigha - Used across multiple states with regional variations
- Katha - Common in West Bengal and Bihar with different sizes
- Decimal (Satak) - Standardized unit equal to 435.6 sq ft
- Dhur - Traditional unit primarily used in Bihar
- Guntha - Used in Odisha and parts of other states
- Kani - Traditional unit in Assam and surrounding regions
- Acre - Standard unit for larger land parcels
- Square feet - Standard unit for urban properties and construction
Because each state follows slightly different conversion values, using a land conversion calculator helps avoid mistakes in property transactions and land registration.
Land Measurement Units in West Bengal
West Bengal uses Bigha, Katha and Decimal as primary land measurement units.
Standard Conversion (West Bengal)
- 1 Bigha = 20 Katha
- 1 Katha = 720 sq ft
- 1 Decimal = 435.6 sq ft
- 1 Bigha = 14,400 sq ft
These units are used for both residential plots and agricultural land throughout West Bengal.
West Bengal Example Calculation
Conversion to Bigha: 3,600 ÷ 14,400 = 0.25 Bigha
Using Decimal: If land = 10 Decimal: 10 × 435.6 = 4,356 sq ft
This is commonly used for plot size calculation in property transactions across West Bengal.
Decimal Conversion in West Bengal
Decimal (also called Satak) is widely used alongside traditional units, especially in official documents.
If a plot is 25 Decimal: 25 × 435.6 = 10,890 sq ft
Conversion to Katha: 10,890 ÷ 720 = 15.125 Katha
Using a plot area calculator, you can convert this into acre or square meter instantly for accurate planning.
Land Measurement in Bihar
Bihar uses Bigha, Katha and Dhur as traditional land measurement units.
Bihar Conversion Values
- 1 Bigha = 20 Katha
- 1 Katha = 1,361 sq ft (approx)
- 1 Dhur = 68 sq ft (standard)
- 1 Bigha = 20 Katha = 27,220 sq ft
Note: Katha size can vary by district in Bihar. Always confirm local values.
Bihar Calculation Example
Conversion to Katha: 680 ÷ 1,361 ≈ 0.5 Katha
Using Katha: If plot = 5 Katha: 5 × 1,361 = 6,805 sq ft
Because conversions vary by district, always confirm local values with the local revenue office before property transactions.
Land Measurement in Odisha
Odisha commonly uses Guntha and Decimal for land measurement.
Odisha Conversion Standards
- 1 Guntha = 1,089 sq ft
- 1 Decimal = 435.6 sq ft
- 40 Guntha = 1 Acre
- 1 Acre = 43,560 sq ft
Guntha is widely used for agricultural land measurement throughout Odisha.
Odisha Example Calculation
Conversion to Decimal: 5,445 ÷ 435.6 = 12.5 Decimal
Conversion to acre: 5,445 ÷ 43,560 = 0.125 acres
This system is widely used for agricultural land measurement and property registration in Odisha.
Land Measurement in Assam
Assam uses Bigha, Katha, Lecha and Kani as traditional measurement units.
Assam Conversion Values
- 1 Bigha = 14,400 sq ft
- 1 Katha = 2,880 sq ft
- 1 Lecha = 144 sq ft
- 1 Kani = 5,760 sq ft (varies by region)
These traditional units are commonly used in rural Assam for agricultural and residential land.
Assam Calculation Example
Conversion to Bigha: 5,760 ÷ 14,400 = 0.4 Bigha
Using Lecha: If plot = 100 Lecha: 100 × 144 = 14,400 sq ft = 1 Bigha
Always verify local conversion factors as traditional units may have regional variations within Assam.
East India Land Conversion Chart
Use this comprehensive conversion list for accurate land unit conversions across East India:
How to Calculate Land Area (Step-by-Step)
Follow these simple steps to calculate any plot area accurately in East India:
Step 1: Measure Length and Width
Tools to use: Measuring tape, survey map, GPS device, laser distance meter.
Always measure twice and record in feet or meters.
Step 2: Apply Area Formula
Rectangular plot: Land area = Length × Width
Triangular plot: Area = ½ × Base × Height
Step 3: Convert to Local Units
to Katha (WB): 2,400 ÷ 720 = 3.33 Katha
to Dhur: 2,400 ÷ 68 = 35.29 Dhur
Use our land area converter tool for instant conversions.
Land Area Calculation for Irregular Plots
If land shape is irregular, divide into regular shapes (rectangles, triangles), calculate each, sum them, then convert to local units. Our online land area calculator has a dedicated irregular plot mode.
Why Accurate Land Measurement is Important
Accurate measurement is critical for property transactions, construction, agricultural planning, and legal documentation. An error can lead to financial losses or disputes. Always use a reliable land measurement calculator.
Common Land Measurement Mistakes to Avoid
Wrong Conversion Values
Never mix West Bengal Katha with Bihar Katha. Verify state-specific values.
Ignoring Regional Variations
Katha size can change within a district. Confirm with the patwari.
Irregular Shapes
Don't assume all plots are rectangular. Divide and measure properly.
Land Measurement Tips for Property Buyers
- Confirm the local unit system.
- Check conversion values with the revenue office.
- Verify with a land calculator.
- Use official survey maps.
- Consult a property lawyer.
- Physically measure the site.
State-Wise Differences in East India
Always verify locally or use our East India land converter.
Frequently Asked Questions
Land is measured using traditional units (Bigha, Katha, Decimal, Dhur) that vary by state, alongside modern units like square feet and acres.
1 Katha = 720 sq ft in West Bengal. 20 Katha = 1 Bigha (14,400 sq ft).
100 Decimal = 1 acre (1 Decimal = 435.6 sq ft).
Dhur is a Bihar unit ≈ 68 sq ft (varies by district).
Yes, online calculators eliminate human error. Combine with manual measurement for best results. Use our calculator.
1 acre = 3.025 Bigha (WB).
1 Guntha = 1,089 sq ft; 40 Guntha = 1 acre.
Multiply Bigha by 14,400 (standard Assam Bigha).
WB: 1 Katha = 720 sq ft; Bihar: ≈ 1,361 sq ft.
Divide into regular shapes, calculate separately, sum, then convert. Our calculator has an irregular plot mode.
Yes, 1 Decimal = 435.6 sq ft everywhere in East India.
Enter length and width in feet, select the unit, and the calculator converts automatically.
Mixing state-specific Katha values, ignoring Dhur variations, and assuming rectangular shapes.
Get a survey map, measure physically, check with a calculator, consult a lawyer.
Decimal provides a uniform measurement across states, simplifying official documentation.
Conclusion
Understanding East India's land measurement units is essential for property transactions. Use our land area calculator for instant, accurate conversions.
- 1 Katha = 720 sq ft (WB) vs ~1,361 sq ft (Bihar)
- 1 Decimal = 435.6 sq ft (standard)
- 1 Guntha = 1,089 sq ft (Odisha)
- Always verify local values and use a reliable calculator.
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Complete East India land measurement guide with Bigha, Katha, Decimal, Dhur conversions. Includes free calculator tools for West Bengal, Bihar, Odisha, Assam.