What is Biswa To Katha Converter North India?
Convert Biswa to Katha in North India. 1 Biswa (UP) = 1 Bihar Katha approximately (both ~1,350-1,361 sqft).
Historical origin and significance of the Biswa
The Biswa derives from the Sanskrit vinsha meaning twentieth -- it is always 1/20 of the local Bigha. British colonial land settlement reports from the 1860s record the Biswa as the unit patwaris used for calculating individual field sizes in khasra-khatauni registers. The UP Revenue Code legally codifies 1 Biswa at 1,350 sq ft. Its sub-unit Biswansi was used to record fractional ownership in joint-family landholdings.
How to use this calculator
Enter any value in the Biswa input field above. The result in Katha appears instantly as you type. The conversion uses the formula:
1 Biswa = 1.0000 Katha
The calculator is bidirectional. Click the swap button to convert from Katha back to Biswa. All calculations run locally in your browser with no data sent to any server.
Conversion formula and reference table
Exact formula: Value in Katha = Value in Biswa × 1.0000. Reverse: Value in Biswa = Value in Katha ÷ 1.0000.
| Biswa | Katha |
|---|---|
| 0.5 Biswa | 0.5000 Katha |
| 1 Biswa | 1.00 Katha |
| 2 Biswa | 2.00 Katha |
| 5 Biswa | 5.00 Katha |
| 10 Biswa | 10.00 Katha |
| 25 Biswa | 25.00 Katha |
Conversion accuracy and official sources
The conversion factor used — 1 Biswa = 1.0000 Katha — 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.
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 Biswa 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 Biswa 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
Is 1 Biswa equal to 1 Katha?
Approximately yes — UP Biswa = 1,350 sqft, Bihar Katha = 1,361 sqft.
Which states use Biswa vs Katha?
Biswa: UP, Haryana, Punjab, Rajasthan. Katha: Bihar, Jharkhand, WB, Assam.
How many Biswa in 1 Bigha UP?
20 Biswa = 1 Bigha in UP.
How many Katha in 1 Bigha Bihar?
20 Katha = 1 Bigha in Bihar.
Are Biswa and Katha interchangeable?
No, they belong to different measurement systems. Just similar in size.
Related calculators
- Bigha To Square Feet In Up
- Bigha To Square Feet In Bihar
- Bigha To Square Feet In Rajasthan
- Bigha To Square Feet In West Bengal
- Bigha To Square Feet In Madhya Pradesh
- Bigha To Square Feet In Uttarakhand
Bookmark this page for instant access. Share it with your property broker, jeweller, tailor, or contractor so every party works from the same verified measurement standard.