What is Chatak To Square Feet In Assam Calculator?
Convert Chatak to Square Feet in Assam. 1 Chatak in Assam = 180 sq ft (4x larger than Bengal Chatak of 45 sq ft).
Historical origin and significance of the Chatak
The Chatak derives from the Persian chatak meaning a small weight, reflecting the cross-cultural trade vocabulary of Bengal. In West Bengal, 16 Chatak equal 1 Katha. Century-old zamindari properties in Kolkata north -- including Shyambazar, Shyampukur, and Jorasanko -- are still measured in Chatak in mutation records at the Kolkata Municipal Corporation. A standard Kolkata single-room flat of 180 sq ft equals exactly 4 Bengal Chatak.
How to use this calculator
Enter any value in the Chatak input field above. The result in Square Feet appears instantly as you type. The conversion uses the formula:
1 Chatak = 180.00 Square Feet
The calculator is bidirectional. Click the swap button to convert from Square Feet back to Chatak. All calculations run locally in your browser with no data sent to any server.
Conversion formula and reference table
Exact formula: Value in Square Feet = Value in Chatak × 180.00. Reverse: Value in Chatak = Value in Square Feet ÷ 180.00.
| Chatak | Square Feet |
|---|---|
| 0.5 Chatak | 90.00 Square Feet |
| 1 Chatak | 180.00 Square Feet |
| 2 Chatak | 360.00 Square Feet |
| 5 Chatak | 900.00 Square Feet |
| 10 Chatak | 1,800 Square Feet |
| 25 Chatak | 4,500 Square Feet |
State-wise Chatak comparison
| State | 1 Chatak in Sq Ft | 1 Chatak in Sq M |
|---|---|---|
| West Bengal | 45.00 | 4.18 |
| Assam ★ | 180.00 | 16.72 |
★ = This calculator standard. Other state values shown for reference only.
Conversion accuracy and official sources
The conversion factor used — 1 Chatak = 180.00 Square Feet — is sourced from: State Revenue Department records, DILRMP (Digital India Land Records Modernisation Programme), and official Jamabandi portal documentation.
Traditional Indian measurement units can vary between districts within the same state, between historical periods, and between formal (government-recorded) and informal (market-practice) usage. The factor used here represents the current officially notified standard.
This calculator applies the Assam official standard. Conversion factors for traditional Indian units vary between states and sometimes between districts. Always verify the applicable local standard with your district patwari, sub-registrar, or BIS-certified assayer before finalising any legal or financial transaction.
Step-by-step verification guide
- Obtain official documents first. For land: retrieve Khasra-Khatauni from your state land records portal. For gold: request a BIS hallmark certificate. The area or weight will be stated in the traditional unit alongside the metric equivalent.
- Use calibrated instruments. For land: a licensed surveyor uses a standard Gunter chain (66 feet) or electronic total station. For gold and cooking: use a BIS-certified laboratory balance traceable to the National Physical Laboratory (NPL India).
- Verify boundary markers. Every registered plot has boundary pillars (dhaiya) at corners. Measure each boundary independently and verify against the document dimensions.
- Cross-check with the issuing authority. For any transaction above Rs 10 lakh, an official survey by the revenue department or a BIS-certified assayer is recommended before registration.
- Convert to metric for official submissions. All government filings (RERA, bank valuations, mutation) require metric units. Use the conversion this calculator provides for your official submission documents.
Common errors and how to avoid them
- Assuming a uniform standard across states. The Chatak varies significantly by state. Always confirm the state-specific standard before converting.
- Confusing similar-sounding units. Many Indian measurement units share similar names but differ widely in value. For example, Bihar Dhur (68 sq ft) and Tripura Dhur (3.6 sq ft) are entirely different despite the same name.
- Using outdated factors. Some older websites cite historical or regional variants. This calculator uses the current officially notified standard.
- Premature rounding. For property transactions, use full decimal precision. A rounding error of 0.1 Chatak on a 10-unit plot can represent a legally significant area.
- Not accounting for deductions. In land measurement, recorded area includes rights-of-way, water channels, and boundary widths. Usable (net) area is typically 95-98% of gross recorded area.
Frequently asked questions
How many sq ft is 1 Chatak in Assam?
1 Chatak = 180 sq ft in Assam.
Is Assam Chatak same as West Bengal Chatak?
No. Assam = 180 sq ft; Bengal = 45 sq ft.
How many Chatak in 1 Katha Assam?
1 Katha = 5 Chatak in Assam (Assam Katha = 900 sq ft historically).
Is Chatak used in Assam revenue records?
Yes, it appears in Assam jamabandi records.
How to convert Assam Chatak to Decimal?
1 Chatak (Assam) = 180 sq ft = 0.413 Decimal.
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