Assam Land Measurement Guide: Bigha, Katha, Lessa & Square Feet Conversion
Bigha, Katha, Lessa & Square Feet: Assam Land Measurement Guide
Buying, selling, or checking land records in Assam can be confusing because land area is commonly written in traditional units such as Bigha, Katha, and Lessa (also spelled Lecha/Lesa). You may also see square feet, acres, square metres, and hectares.
This guide explains the important conversions and a crucial point: Bigha measurements are not uniform across all Assam documents and local contexts.
Quick Assam Land Measurement Conversion
According to an Assam government land-area metadata standard:
| Land Unit | Conversion |
|---|---|
| 1 Lessa | 144 sq. ft. |
| 1 Katha | 5 Lessa = 720 sq. ft. |
| 1 Bigha | 4 Katha = 20 Lessa = 2,880 sq. ft. |
The official Assam land portal also commonly displays land schedules and transaction areas in the Bigha–Katha–Lessa (B-K-L) format.
Important: Other official Assam project and acquisition documents use a different local convention, such as 1 Bigha = 5 Katha = 20 Lessa = 14,400 sq. ft. This shows why you should never assume that every Assam document uses the same Bigha/Katha relationship without checking the relevant revenue-circle or document convention.
1. What Is a Lessa?
Lessa is the smallest commonly used traditional land-measurement unit in many Assam land records.
Basic conversion
1 Lessa = 144 square feet
Examples:
- 1 Lessa = 144 sq. ft.
- 2 Lessa = 288 sq. ft.
- 5 Lessa = 720 sq. ft.
- 10 Lessa = 1,440 sq. ft.
- 20 Lessa = 2,880 sq. ft. under the metadata standard cited above.
How to calculate Lessa into square feet
Square Feet = Number of Lessa × 144
For example:
7 Lessa × 144 = 1,008 sq. ft.
2. What Is a Katha?
A Katha is a traditional land unit larger than a Lessa.
Under the Assam metadata conversion standard:
1 Katha = 5 Lessa = 720 sq. ft.
Examples
Katha Lessa Square Feet 1 Katha 5 Lessa 720 sq. ft. 2 Katha 10 Lessa 1,440 sq. ft. 3 Katha 15 Lessa 2,160 sq. ft. 4 Katha 20 Lessa 2,880 sq. ft. Katha to square feet formula
Square Feet = Katha × 720
Example:
3 Katha = 3 × 720 = 2,160 sq. ft.
3. What Is a Bigha?
A Bigha is a larger traditional unit used in land records.
Under the Assam land-area metadata conversion standard:
1 Bigha = 4 Katha = 20 Lessa = 2,880 sq. ft.
However, you must be careful: other Assam government documents use a local convention of:
1 Bigha = 5 Katha = 20 Lessa = 14,400 sq. ft.
This difference may relate to the specific measurement convention or local revenue context used in a document. Therefore, before calculating the value or size of a plot, verify the unit basis used for that particular district, revenue circle, land record, survey, or official transaction.
4. The B-K-L Format Explained
Assam land records often show land area as:
B-K-L = Bigha–Katha–Lessa
For example:
2 Bigha 3 Katha 4 Lessa
means:
- 2 Bigha
- 3 Katha
- 4 Lessa
The B-K-L format is widely used in Assam land records and land-related government services.
Important note
You must first confirm the local conversion system before converting the full B-K-L figure into square feet.
5. How to Convert B-K-L to Square Feet
Method 1: Using the 4 Katha = 1 Bigha standard
Under the metadata standard:
- 1 Bigha = 2,880 sq. ft.
- 1 Katha = 720 sq. ft.
- 1 Lessa = 144 sq. ft.
Formula
Total Square Feet = (Bigha × 2,880) + (Katha × 720) + (Lessa × 144)
Example: 1 Bigha 2 Katha 3 Lessa
- 1 Bigha = 2,880 sq. ft.
- 2 Katha = 1,440 sq. ft.
- 3 Lessa = 432 sq. ft.
Total = 4,752 sq. ft.
6. Example Calculations
Example 1: 10 Lessa
10 × 144 = 1,440 sq. ft.
Example 2: 2 Katha 3 Lessa
- 2 Katha = 2 × 720 = 1,440 sq. ft.
- 3 Lessa = 3 × 144 = 432 sq. ft.
Total = 1,872 sq. ft.
Example 3: 3 Katha 4 Lessa
- 3 Katha = 2,160 sq. ft.
- 4 Lessa = 576 sq. ft.
Total = 2,736 sq. ft.
7. Square Feet to Lessa Conversion
To convert square feet into Lessa:
Lessa = Square Feet ÷ 144
Examples
- 720 sq. ft. ÷ 144 = 5 Lessa
- 1,440 sq. ft. ÷ 144 = 10 Lessa
- 2,880 sq. ft. ÷ 144 = 20 Lessa
8. Square Feet to Katha Conversion
Under the 720 sq. ft. per Katha standard:
Katha = Square Feet ÷ 720
Examples
- 720 sq. ft. = 1 Katha
- 1,440 sq. ft. = 2 Katha
- 2,160 sq. ft. = 3 Katha
- 3,600 sq. ft. = 5 Katha
9. Square Feet to Bigha Conversion
If the applicable local standard is 1 Bigha = 2,880 sq. ft.:
Bigha = Square Feet ÷ 2,880
For example:
5,760 sq. ft. ÷ 2,880 = 2 Bigha
If your particular local or official document uses 1 Bigha = 14,400 sq. ft., use that basis instead. This distinction is essential in Assam land transactions.
10. Lessa to Katha Conversion
Under the 5-Lessa-per-Katha standard:
Katha = Lessa ÷ 5
Examples:
- 5 Lessa = 1 Katha
- 10 Lessa = 2 Katha
- 15 Lessa = 3 Katha
- 20 Lessa = 4 Katha
11. Important Conversion Table
Unit Equivalent 1 Lessa 144 sq. ft. 2 Lessa 288 sq. ft. 3 Lessa 432 sq. ft. 4 Lessa 576 sq. ft. 5 Lessa 1 Katha = 720 sq. ft. 10 Lessa 1,440 sq. ft. 15 Lessa 2,160 sq. ft. 20 Lessa 4 Katha = 2,880 sq. ft. The table above follows the Assam metadata standard; always verify the measurement convention applicable to the specific land record.
12. Why Assam Land Measurement Can Be Confusing
Land measurement is not always straightforward because traditional units can vary across regions and documents. Bigha and Katha are local units, and official Assam documents themselves can show different Bigha/Katha relationships.
For example, one Assam government metadata standard specifies:
- 1 Bigha = 4 Katha
- 1 Katha = 5 Lessa
- 1 Bigha = 20 Lessa
Other official Assam documents state:
- 1 Bigha = 5 Katha
- 1 Bigha = 20 Lessa
- 1 Bigha = 14,400 sq. ft.
So, do not rely on a generic online calculator alone when purchasing land.
13. What to Check Before Buying Land in Assam
Before purchasing land, check:
1. The measurement written in the Jamabandi
Check whether the land area is shown in B-K-L format.
2. The exact local measurement convention
Ask the relevant Revenue Circle or qualified land professional which conversion applies to the specific land.
3. Dag number
The Dag number identifies the particular plot.
4. Patta number and Patta type
Check whether the land has the correct patta status and ownership details.
5. Actual physical measurement
The land’s boundary measurement should match the official record and survey.
6. Registered deed
The area in the deed should be carefully checked against the land records.
7. Measurement conversion
Do not calculate the property’s value in square feet until you have confirmed the applicable Bigha–Katha–Lessa standard.
Assam’s official Mission Basundhara services use Bigha–Katha–Lessa land schedules for several land-related applications.
14. Simple Formula to Remember
Lessa to Square Feet
Lessa × 144
Katha to Square Feet
Katha × 720
(where 1 Katha = 5 Lessa)Bigha to Square Feet
Confirm the applicable local/revenue convention first.
Two figures found in official Assam sources include:
- 2,880 sq. ft. per Bigha under the cited metadata standard.
- 14,400 sq. ft. per Bigha in other Assam government documents.
15. Quick Example: Calculating Land Price
Suppose a plot measures 2,880 sq. ft. and the land price is ₹1,000 per sq. ft.
2,880 × ₹1,000 = ₹28,80,000
But the first step is always to confirm that the B-K-L conversion used for the land is correct.
16. The Most Important Assam Conversion System
A major point to clarify is that official Assam sources are not fully consistent. However, recent Assam government land-acquisition documents commonly use this relationship:
- 1 Bigha = 5 Katha
- 1 Katha = 20 Lessa
- 1 Bigha = 100 Lessa
- 1 Lessa = 144 square feet
- 1 Katha = 2,880 square feet
- 1 Bigha = 14,400 square feet
This convention is also used in a recent Assam government project document based on the Revenue Department, Kamrup.
Easy Formula
1 Bigha → 5 Katha → 100 Lessa → 14,400 sq. ft.
1 Katha → 20 Lessa → 2,880 sq. ft.
1 Lessa → 144 sq. ft.
Important: A separate government metadata standard lists a different Assam conversion of 1 Katha = 5 Lessa and 1 Bigha = 2,880 sq. ft. Therefore, the measurement basis in the specific revenue record or official document must always be checked before a transaction.
17. Bigha to Square Feet Conversion Table
Bigha Katha Lessa Square Feet 0.10 0.5 10 1,440 0.25 1.25 25 3,600 0.50 2.5 50 7,200 1 5 100 14,400 2 10 200 28,800 3 15 300 43,200 5 25 500 72,000 10 50 1,000 1,44,000 This table uses the 1 Bigha = 14,400 sq. ft. convention.
18. Katha to Square Feet Conversion Table
Katha Square Feet 0.5 Katha 1,440 sq. ft. 1 Katha 2,880 sq. ft. 2 Katha 5,760 sq. ft. 3 Katha 8,640 sq. ft. 4 Katha 11,520 sq. ft. 5 Katha 14,400 sq. ft. 10 Katha 28,800 sq. ft.
19. Lessa to Square Feet Conversion Table
Since 1 Lessa = 144 square feet, the following table is useful for buyers:
Lessa Square Feet 1 144 2 288 5 720 10 1,440 15 2,160 20 2,880 25 3,600 50 7,200 75 10,800 100 14,400
20. How to Read 1B-2K-10L
Land area in Assam may be written in the following format:
1B-2K-10L
It means:
- 1 Bigha
- 2 Katha
- 10 Lessa
Using the 1 Bigha = 5 Katha = 100 Lessa convention:
- 1 Bigha = 14,400 sq. ft.
- 2 Katha = 5,760 sq. ft.
- 10 Lessa = 1,440 sq. ft.
Total = 21,600 square feet
This B-K-L format is used in Assam government land-service workflows, including land schedules associated with Mission Basundhara services.
21. How to Convert Any B-K-L Figure
Formula
Total Square Feet = (Bigha × 14,400) + (Katha × 2,880) + (Lessa × 144)
Example: 3 Bigha 4 Katha 15 Lessa
- 3 Bigha = 43,200 sq. ft.
- 4 Katha = 11,520 sq. ft.
- 15 Lessa = 2,160 sq. ft.
Total Land Area = 56,880 square feet
Again, use this formula only after confirming that your relevant local record uses this measurement convention.
22. How to Convert B-K-L into Total Lessa
This is one of the easiest methods for calculation.
Formula
Total Lessa = (Bigha × 100) + (Katha × 20) + Lessa
Example: 2 Bigha 3 Katha 5 Lessa
(2 × 100) + (3 × 20) + 5 = 265 Lessa
Then:
265 × 144 = 38,160 square feet
23. How to Convert Square Feet into B-K-L
Suppose the plot is 10,000 square feet.
Step 1: Convert to Lessa
10,000 ÷ 144 = 69.44 Lessa
So, it is approximately 69.44 Lessa.
Step 2: Convert to Katha and Lessa
Since 20 Lessa = 1 Katha:
69.44 Lessa = 3 Katha + 9.44 Lessa
Therefore, the approximate B-K-L equivalent is:
0 Bigha 3 Katha 9.44 Lessa
For exact revenue transactions, follow the official measurement and rounding method used by the relevant authority.
24. What Is a Dag Number?
A Dag Number is an important identification number assigned to a particular land parcel or plot in land records.
When checking a property, do not focus only on the total land area. Also verify:
- Dag Number
- Patta Number
- Name of the Pattadar
- Land classification
- Total land area
- Area being sold
- Mutation status
- Boundary details
Mission Basundhara workflows use the selected Dag to populate the relevant land schedule in Bigha–Katha–Lessa format.
25. What Is the Difference Between Land Area and Plot Dimensions?
This is an important point for buyers.
Land Area
The total size of the land.
For example:
14,400 sq. ft. = 1 Bigha under the applicable 5-Katha/100-Lessa convention.
Plot Dimensions
The length and width of the land.
For example:
120 feet × 120 feet = 14,400 sq. ft.
But not every plot has a perfect rectangular shape. A triangular or irregular plot may have the same total area with completely different boundary dimensions.
26. Why You Should Not Measure Land Only by the Boundary
Imagine a seller says:
“The plot is 1 Katha.”
You should not rely only on the verbal statement.
Check:
- Official land record
- Registered deed
- Dag details
- Survey or map
- Actual boundaries
- Whether the measurement refers to gross or transferable area
- The local Bigha-Katha-Lessa conversion
Even a small conversion mistake can create a major difference in land value.
27. Calculate Land Price Per Katha
Suppose the land price is:
₹2,000 per square foot
If 1 Katha = 2,880 sq. ft.:
2,880 × ₹2,000 = ₹57,60,000 per Katha
So, at this rate:
Area Approximate Price 1 Lessa ₹2,88,000 5 Lessa ₹14,40,000 10 Lessa ₹28,80,000 1 Katha ₹57,60,000 1 Bigha ₹2.88 crore This is only an example using ₹2,000 per sq. ft.
28. How to Compare Two Land Offers
Suppose:
Plot A
2 Katha 10 Lessa
Total:
- 2 Katha = 5,760 sq. ft.
- 10 Lessa = 1,440 sq. ft.
Total = 7,200 sq. ft.
Plot B
2 Katha 15 Lessa
Total:
- 2 Katha = 5,760 sq. ft.
- 15 Lessa = 2,160 sq. ft.
Total = 7,920 sq. ft.
Difference
7,920 − 7,200 = 720 sq. ft.
So, Plot B has 720 square feet more land.
29. Common Land Measurement Terms in Assam
Bigha (বিঘা)
A large traditional unit used for measuring land.
Katha (কঠা)
A smaller traditional land unit.
Lessa / Lecha (লেছা)
A smaller subdivision used for precise land measurement.
Square Feet
A standard unit widely used in property advertisements and urban real estate.
B-K-L
Short form for:
Bigha–Katha–Lessa
Dag
The identifying number of a particular land parcel.
Patta
A land-right or settlement record used in Assam’s land-revenue system.
Jamabandi
The Record of Rights containing important land information.
30. Difference Between Assam and West Bengal Land Measurement
This is very important because Katha and Bigha do not have the same meaning everywhere.
A person buying land in Assam should not automatically use a West Bengal, Bihar, Uttar Pradesh, or other state’s land converter.
The name of the unit may be the same, but the actual area can be different. The Government of India’s land-record metadata standards specifically list Bigha (Assam), Katha (Assam), and Lessa as separate land-record units, which reflects the importance of local measurement conventions.
31. Acre to Square Feet Conversion
For larger land parcels, Acre is also useful.
1 Acre = 43,560 square feet
Using the 14,400 sq. ft. Bigha convention:
1 Acre ≈ 3.025 Bigha
Example
If land is 2 Acres:
2 × 43,560 = 87,120 sq. ft.
87,120 ÷ 14,400 ≈ 6.05 Bigha
32. Bigha to Acre Conversion
Using 1 Bigha = 14,400 sq. ft.:
1 Bigha ≈ 0.3306 Acre
3 Bigha ≈ 0.9917 Acre
5 Bigha ≈ 1.653 Acre
10 Bigha ≈ 3.306 Acres
33. Bigha to Square Metre Conversion
Using 1 Bigha = 14,400 sq. ft.:
1 Bigha ≈ 1,337.8 square metres
1 Katha ≈ 267.56 square metres
1 Lessa ≈ 13.38 square metres
These approximate metric conversions are useful when comparing traditional land records with modern survey or planning documents.
34. Questions to Ask Before Buying a Plot
Before paying an advance, ask:
- What is the exact area in B-K-L?
- How many square feet does it represent?
- Which Bigha-Katha-Lessa conversion is being used?
- What is the Dag Number?
- What is the Patta Number?
- Who is the recorded Pattadar?
- Does the deed show the same area?
- Has the land been properly mutated?
- Are the boundaries clear?
- Is there any encroachment?
- Is the plot connected to a legal access road?
- Does the physical measurement match the official record?
35. Best Practice for Assam Land Buyers
The safest method is:
B-K-L shown in record → Confirm local conversion → Convert to square feet → Compare deed → Verify physical measurement
Never use:
Broker’s verbal claim → Quick online calculator → Purchase
The Directorate of Land Records maintains official Assam land manuals and land-record resources, which can be useful when checking the legal and revenue context of land measurements.
Final Thoughts
Understanding Bigha, Katha, Lessa, and Square Feet is essential for anyone dealing with land in Assam. While square feet is useful for comparing property sizes and prices, the traditional Bigha–Katha–Lessa (B-K-L) system remains important in Assam’s land records and government services. Mission Basundhara, for example, uses B-K-L when displaying land schedules for a Dag and entering land areas for several revenue services.
The most important lesson is that you should never assume a conversion without checking the measurement convention used in the specific land record. Government and institutional sources can show different conversion standards, so before calculating the actual land area or property value, verify the relevant Jamabandi, registered deed, survey details, and official revenue records.
A simple approach is:
Check B-K-L → Verify the applicable conversion → Convert to square feet → Compare the deed and land records → Confirm the physical measurement.
Ultimately, correct land measurement can help buyers and landowners avoid pricing mistakes, area disputes, documentation problems, and costly errors. Before making a major transaction, consult the relevant Assam revenue authorities or official land records.
