Convert Katha (Bihar) to Guntha
Convert kathas to gunthas instantly. 1 katha (bihar) = 1.2497652489 guntha — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Guntha to Katha (Bihar) converter for the reverse conversion.
Units explained
Katha (Bihar)
A Bihar katha is a traditional unit of land area equal to approximately 126.44 m² (1/20 of a pucca bigha in Bihar).
Defined as 1/20 of the Bihar pucca bigha. Like other regional kathas, the actual size varies with the local bigha.
Bihar kathas appear in land records and property transactions across Bihar.
Traditional regional unit.
Guntha
A guntha is a unit of land area used in Maharashtra, Karnataka, and parts of Andhra Pradesh, equal to approximately 101.171 m² (1/40 acre or 121 square yards).
Defined as 1/40 of an acre during British colonial administration in the Bombay Presidency and adjacent regions.
Gunthas are the standard unit for residential plots in Maharashtra (Pune, Mumbai suburbs), parts of Karnataka, and Telangana. 1 acre = 40 gunthas; the conversion is widely memorized in regional real estate.
Standardized in colonial Bombay Presidency.
Katha (Bihar) to Guntha conversion formula
The relationship between kathas and gunthas:
To convert kathas to gunthas, multiply the value in kathas by 1.2497652489. To reverse, multiply gunthas by 0.8001502689.
How to use this converter
Type a value into the calculator. The result in gunthas updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Guntha to Katha (Bihar) converter for the reverse direction.
Step-by-step: convert kathas to gunthas
- Write down the value in kathas (katha).
- Multiply that value by the factor 1.2497652489.
- The product is the equivalent value in gunthas (guntha).
- To reverse, multiply the guntha value by 0.8001502689.
Worked examples
Example 1 — Convert 1 katha to guntha:
1 × 1.2497652489 = 1.2497652489 guntha
Example 2 — Convert 100 katha to guntha:
100 × 1.2497652489 = 124.9765248935 guntha
Katha (Bihar) to Guntha conversion table
Standard reference values for converting kathas to gunthas:
| Katha (Bihar) [katha] | Guntha [guntha] |
|---|---|
| 0.01 | 0.0124976525 |
| 0.1 | 0.1249765249 |
| 1 | 1.2497652489 |
| 2 | 2.4995304979 |
| 3 | 3.7492957468 |
| 4 | 4.9990609957 |
| 5 | 6.2488262447 |
| 10 | 12.4976524893 |
| 20 | 24.9953049787 |
| 30 | 37.492957468 |
| 40 | 49.9906099574 |
| 50 | 62.4882624467 |
| 100 | 124.9765248935 |
| 500 | 624.8826244675 |
| 1000 | 1249.765248935 |
Frequently asked questions
How many gunthas is 1 katha (bihar)?
How do I convert kathas to gunthas?
How do I convert gunthas back to kathas?
How many gunthas is 100 kathas?
Popular area unit conversions
Convert Katha (Bihar) to other area units
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Indian Subcontinent (15 units)
Sources & references
Conversion factor (1 katha = 1.2497652489 guntha) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.