Project12WEST BENGAL · জমির মাপ
West Bengal Land Unit Converter
Enter an area to see its equivalent in every supported unit. Results update as you type based on West Bengal Land Records standards.
Convert your land area
| Unit | Area |
|---|---|
| Satak (Decimal) | — |
| Katha | — |
| Chatak | — |
| Bigha | — |
| Acre | — |
| Square Feet | — |
Displayed results are rounded to six decimal places. Calculations use unrounded square-foot conversion factors.
West Bengal Official Land Measurement Standards (জমির পরিমাপের একক)
In West Bengal, land revenue records administered by the Directorate of Land Records and Surveys (DLR&S) and the Banglarbhumi portal operate on standardized square-foot equivalencies established under the West Bengal Land Reforms framework. While registered deeds often cite traditional Bigha-Katha-Chatak units, all computerized Khatians (Record-of-Rights) record areas strictly in Acre and Decimals (Satak).
| Unit (English / বাংলা) | Square Feet (বর্গফুট) | Satak / Decimal (শতক) | Metric (বর্গমিটার) | Standard Relationship |
|---|---|---|---|---|
| 1 Bigha (১ বিঘা) | 14,400 sq. ft. | 33.057851 Satak | 1,337.80 sq. m. | 20 Katha = 320 Chatak |
| 1 Katha (১ কাঠা) | 720 sq. ft. | 1.652893 Satak | 66.89 sq. m. | 16 Chatak = 1/20 Bigha |
| 1 Chatak (১ ছটাক) | 45 sq. ft. | 0.103306 Satak | 4.18 sq. m. | 20 Gandha = 1/16 Katha |
| 1 Satak / Decimal (১ শতক) | 435.60 sq. ft. | 1.000000 Satak | 40.47 sq. m. | 1/100 Acre = 0.605 Katha |
| 1 Acre (১ একর) | 43,560 sq. ft. | 100.000000 Satak | 4,046.86 sq. m. | 3 Bigha 8 Chatak = 100 Satak |
| 1 Gandha (১ গণ্ডা) | 2.25 sq. ft. | 0.005165 Satak | 0.21 sq. m. | 1/20 Chatak = 4 Kori |
The "33 Satak = 1 Bigha" Rule vs. Exact Math:
A widespread colloquial convention in rural West Bengal asserts that 1 Bigha equals 33 Satak. However, 14,400 sq. ft. ÷ 435.6 sq. ft. = 33.057851 Satak. The difference of approximately 0.0579 Satak (25.2 square feet per Bigha) is critical during Sub-Registry stamp duty valuation and BL&LRO mutation hearings. Rounding down to 33 leads to missing fractions when calculating multiple heirs or contiguous plots.
How to Convert Deed Areas for Banglarbhumi Mutation
Registered purchase deeds (দলিল) or gift deeds in West Bengal typically describe the plot size using Bigha, Katha, and Chatak. To file a mutation application under Section 50 of the West Bengal Land Reforms Act, 1955, you must enter the exact area in Acre or Satak (Decimal).
Scenario A: Deed in Katha & Chatak to Satak
Example: A deed transfers 3 Katha 8 Chatak.
1. Calculate square feet: (3 × 720) + (8 × 45) = 2,160 + 360 = 2,520 sq. ft.
2. Convert to Satak: 2,520 ÷ 435.6 = 5.785 Satak (or 0.0579 Acre).
Enter 0.0579 in the Banglarbhumi mutation form.
Scenario B: Building Plan Sanction (Sq. Ft.)
Example: Municipality requires minimum land for residential sanction.
1. 2 Katha = 2 × 720 = 1,440 sq. ft. (≈ 3.31 Satak).
2. 3 Katha = 3 × 720 = 2,160 sq. ft. (≈ 4.96 Satak).
Civil engineers and architects use the 720 sq. ft. factor for West Bengal Municipal Building Rules.
Frequently Asked Questions (সচরাচর জিজ্ঞাস্য প্রশ্ন)
How many Satak (Decimal) make 1 Bigha in West Bengal?
In West Bengal standard land revenue measurement, exactly 1 Bigha equals 14,400 square feet, and 1 Satak (Decimal) equals 435.60 square feet. Dividing 14,400 by 435.60 gives exactly 33.057851 Satak. While local colloquials frequently round this figure to "33 শতক" (33 Satak), official records, computerized Banglarbhumi Khatians, and registered deed valuations rely on the exact square-foot measurement to eliminate area discrepancies.
Why does my registered deed (দলিল) show Katha and Chatak, but Banglarbhumi shows Acre?
Under the West Bengal Land Reforms Act and the Directorate of Land Records and Surveys (DLR&S) standards, computerized Record-of-Rights (Khatians/Porchas) on Banglarbhumi are maintained exclusively in the metric/Acre-Decimal system (recorded to 4 decimal places, e.g., 0.1450 Acre). Deeds executed by deed writers at Sub-Registry offices historically recorded measurements in Bigha-Katha-Chatak. When applying for mutation, you must convert the deed measurement into Acre/Decimal fractions.
Is the measurement of 1 Katha uniform across all states in India?
No. Land units like Katha and Bigha vary widely by region. In West Bengal, 1 Katha is legally standardized at 720 square feet (1/20th of a 14,400 sq. ft. Bigha). In contrast, in Bihar 1 Katha can be 1,361 sq. ft., in parts of Uttar Pradesh it ranges between 750 and 2,000 sq. ft., and in Assam it is roughly 2,880 sq. ft. This calculator is strictly calibrated for West Bengal administrative standards.
What are smaller traditional units like Chatak, Gandha, Kori, and Kranti?
Traditional Bengali land measurement systems divided units as follows: 1 Katha = 16 Chatak (720 sq. ft.); 1 Chatak = 20 Gandha (45 sq. ft.); 1 Gandha = 4 Kori (2.25 sq. ft.); 1 Kori = 3 Kranti (0.75 sq. ft.); and 1 Kranti = 20 Til (0.0375 sq. ft.). These granular divisions frequently appear in older C.S. (Cadastral Survey) and R.S. (Revisional Survey) Khatians and ancestral partitioning deeds.
How do I verify the land area before submitting a mutation application at the BL&LRO?
Compare the land schedule in your registered deed (দলিল) with the latest published Khatian on the Banglarbhumi portal ("Know Your Property" service). Calculate the total square feet from your deed (Bigha × 14,400 + Katha × 720 + Chatak × 45), divide by 435.6 to find Satak, and ensure it matches the seller’s recorded decimal share in that plot (দাগ নম্বর). If there is a discrepancy, consult the local BL&LRO office before submitting.
Authoritative Sources & Statutory References
This calculator and reference table are compiled in accordance with West Bengal land revenue acts, official administrative manuals, and government portal specifications:
- Banglarbhumi Portal — Land & Land Reforms and RR&R Department, Government of West BengalOfficial Authority
Official digital portal for Record-of-Rights (Khatians), plot maps, mutation, and land conversion in West Bengal.
banglarbhumi.gov.in - Directorate of Land Records & Surveys (DLR&S), West BengalOfficial Authority
Custodians of cadastral survey standards and the West Bengal Land & Land Reforms Manual (1991).
wblandrecords.gov.in - Directorate of Registration and Stamp Revenue, West BengalOfficial Authority
Administers deed registration, market valuation assessment, and standard land schedules under the Registration Act.
wbregistration.gov.in - The West Bengal Land Reforms Act, 1955 (Act X of 1956)Official Authority
Sections 49, 50, and 51 governing raiyats holdings, ceiling limits, and maintenance of the Record-of-Rights by the BL&LRO.
wb.gov.in