What is Katha To Decimal Converter Bihar Bengal?
Convert Katha to Decimal in Bihar and West Bengal. 1 Katha (Bihar) = 3.125 Decimal.
Historical origin and significance of the Katha
The Katha is documented in the Permanent Settlement Act of 1793 introduced by Lord Cornwallis, which formed the basis for land revenue in Bengal, Bihar, and Orissa. Bihar Katha equals 1,361 sq ft, West Bengal Katha equals 720 sq ft, and Assam Katha equals 2,880 sq ft. This variation exists because the parent Bigha was itself variable. Katha remains the dominant listing unit in Patna, Kolkata, and Guwahati property markets.
How to use this calculator
Enter any value in the Katha input field above. The result in Decimal appears instantly as you type. The conversion uses the formula:
1 Katha = 3.1250 Decimal
The calculator is bidirectional. Click the swap button to convert from Decimal back to Katha. All calculations run locally in your browser with no data sent to any server.
Conversion formula and reference table
Exact formula: Value in Decimal = Value in Katha × 3.1250. Reverse: Value in Katha = Value in Decimal ÷ 3.1250.
| Katha | Decimal |
|---|---|
| 0.5 Katha | 1.56 Decimal |
| 1 Katha | 3.13 Decimal |
| 2 Katha | 6.25 Decimal |
| 5 Katha | 15.63 Decimal |
| 10 Katha | 31.25 Decimal |
| 25 Katha | 78.13 Decimal |
State-wise Katha comparison
| State | 1 Katha in Sq Ft | 1 Katha in Sq M |
|---|---|---|
| Bihar | 1,361.00 | 126.44 |
| Jharkhand | 1,361.00 | 126.44 |
| West Bengal | 720.00 | 66.89 |
| Assam | 2,880.00 | 267.55 |
★ = This calculator standard. Other state values shown for reference only.
Conversion accuracy and official sources
The conversion factor used — 1 Katha = 3.1250 Decimal — 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 Bihar/Bengal 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 Katha 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 Katha 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 Decimal is 1 Katha in Bihar?
1 Bihar Katha (1,361 sqft) = 3.125 Decimal (435.6 sqft each).
How many Decimal in 1 Katha West Bengal?
1 WB Katha (720 sqft) = 1.653 Decimal.
What is Decimal in land measurement?
1 Decimal = 435.6 sq ft = 1/100 of an Acre. Same as Cent.
How many Katha in 1 Bigha Bihar?
1 Bigha = 20 Katha in Bihar.
Is Decimal same as Dismil?
Yes, Decimal and Dismil are the same unit = 435.6 sq ft.
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