Convert Katha (Bengal) to Square Kilometer
Convert kathas to square kilometers instantly. 1 katha (bengal) = 6.689e-5 square kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Kilometer 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.
Square Kilometer
A square kilometer is a metric unit of area equal to 1,000,000 m² (one million square meters), or 100 hectares. It is used for measuring large land areas, regional geography, and country-scale statistics.
Derived by squaring the kilometer (1000 m). The kilo- prefix comes from the Greek 'chilioi' (thousand).
Square kilometers express the area of cities, districts, lakes, forests, and entire countries. India's total area is approximately 3,287,263 km². 1 km² equals 100 hectares or about 247.105 acres.
Kilometer has been part of the metric system since 1795.
Katha (Bengal) to Square Kilometer conversion formula
The relationship between kathas and square kilometers:
To convert kathas to square kilometers, multiply the value in kathas by 6.689e-5. To reverse, multiply square kilometers by 14949.9177754522.
How to use this converter
Type a value into the calculator. The result in square kilometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Kilometer to Katha (Bengal) converter for the reverse direction.
Step-by-step: convert kathas to square kilometers
- Write down the value in kathas (katha).
- Multiply that value by the factor 6.689e-5.
- The product is the equivalent value in square kilometers (km²).
- To reverse, multiply the square kilometer value by 14949.9177754522.
Worked examples
Example 1 — Convert 1 katha to km²:
1 × 6.689e-5 = 6.689e-5 km²
Example 2 — Convert 100 katha to km²:
100 × 6.689e-5 = 0.006689 km²
Katha (Bengal) to Square Kilometer conversion table
Standard reference values for converting kathas to square kilometers:
| Katha (Bengal) [katha] | Square Kilometer [km²] |
|---|---|
| 0.01 | 6.689e-7 |
| 0.1 | 6.689e-6 |
| 1 | 6.689e-5 |
| 2 | 0.00013378 |
| 3 | 0.00020067 |
| 4 | 0.00026756 |
| 5 | 0.00033445 |
| 10 | 0.0006689 |
| 20 | 0.0013378 |
| 30 | 0.0020067 |
| 40 | 0.0026756 |
| 50 | 0.0033445 |
| 100 | 0.006689 |
| 500 | 0.033445 |
| 1000 | 0.06689 |
Frequently asked questions
How many square kilometers is 1 katha (bengal)?
How do I convert kathas to square kilometers?
How do I convert square kilometers back to kathas?
How many square kilometers is 100 kathas?
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Indian Subcontinent (15 units)
Sources & references
Conversion factor (1 katha = 6.689e-5 km²) 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.