Convert Katha (Bengal) to Hectare
Convert kathas to hectares instantly. 1 katha (bengal) = 0.006689 hectare — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectare to Katha (Bengal) converter for the reverse conversion.
Units explained
Katha (Bengal)
A Bengal katha is a traditional unit of land area equal to approximately 66.89 m² (1/20 of a Bengal bigha or 720 square feet). Used in West Bengal and Bangladesh.
Defined as 1/20 of the Bengal bigha during colonial standardization.
Bengal kathas are widely used in residential property descriptions in Kolkata, Dhaka, and other Bengali-speaking regions. Property advertisements often list area in kathas with chatak (1/16 katha) subdivisions.
Standardized in colonial Bengal.
Hectare
A hectare is a metric unit of area equal to 10,000 square meters, or one square hectometer. It is the most widely used metric unit for land measurement worldwide.
Defined as 100 ares, equal to one square hectometer. The name was introduced in 1795 in France as part of the metric system.
Hectares are the standard unit for agricultural land measurement worldwide except in the US (which uses acres). 1 hectare equals 2.47105 acres. In India, hectares are used in modern agricultural census and land records alongside traditional regional units.
Adopted in France in 1795; standardized internationally through the SI system.
Katha (Bengal) to Hectare conversion formula
The relationship between kathas and hectares:
To convert kathas to hectares, multiply the value in kathas by 0.006689. To reverse, multiply hectares by 149.4991777545.
How to use this converter
Type a value into the calculator. The result in hectares updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hectare to Katha (Bengal) converter for the reverse direction.
Step-by-step: convert kathas to hectares
- Write down the value in kathas (katha).
- Multiply that value by the factor 0.006689.
- The product is the equivalent value in hectares (ha).
- To reverse, multiply the hectare value by 149.4991777545.
Worked examples
Example 1 — Convert 1 katha to ha:
1 × 0.006689 = 0.006689 ha
Example 2 — Convert 100 katha to ha:
100 × 0.006689 = 0.6689 ha
Katha (Bengal) to Hectare conversion table
Standard reference values for converting kathas to hectares:
| Katha (Bengal) [katha] | Hectare [ha] |
|---|---|
| 0.01 | 6.689e-5 |
| 0.1 | 0.0006689 |
| 1 | 0.006689 |
| 2 | 0.013378 |
| 3 | 0.020067 |
| 4 | 0.026756 |
| 5 | 0.033445 |
| 10 | 0.06689 |
| 20 | 0.13378 |
| 30 | 0.20067 |
| 40 | 0.26756 |
| 50 | 0.33445 |
| 100 | 0.6689 |
| 500 | 3.3445 |
| 1000 | 6.689 |
Frequently asked questions
How many hectares is 1 katha (bengal)?
How do I convert kathas to hectares?
How do I convert hectares back to kathas?
How many hectares is 100 kathas?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Indian Subcontinent (15 units)
Sources & references
Conversion factor (1 katha = 0.006689 ha) 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 Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.