Convert Square Kilometer to Chō
Convert square kilometers to chōs instantly. 1 square kilometer = 100.8332862778 chō — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Chō to Square Kilometer converter for the reverse conversion.
Units explained
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.
Chō
A chō is a Japanese unit of large-scale area equal to approximately 9917.36 m² (about 0.991 hectare or 2.45 acres). It equals 3,000 tsubo.
Traditional Japanese land area unit, used historically for rice paddies and large estates.
Chōs appear in Japanese agricultural records and historical land documents. Modern usage favors hectares for new transactions but legacy records remain.
Traditional Japanese unit; standardized via the tsubo definition.
Square Kilometer to Chō conversion formula
The relationship between square kilometers and chōs:
To convert square kilometers to chōs, multiply the value in square kilometers by 100.8332862778. To reverse, multiply chōs by 0.00991736.
How to use this converter
Type a value into the calculator. The result in chōs updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Chō to Square Kilometer converter for the reverse direction.
Step-by-step: convert square kilometers to chōs
- Write down the value in square kilometers (km²).
- Multiply that value by the factor 100.8332862778.
- The product is the equivalent value in chōs (chō).
- To reverse, multiply the chō value by 0.00991736.
Worked examples
Example 1 — Convert 1 km² to chō:
1 × 100.8332862778 = 100.8332862778 chō
Example 2 — Convert 100 km² to chō:
100 × 100.8332862778 = 10083.32862778 chō
Square Kilometer to Chō conversion table
Standard reference values for converting square kilometers to chōs:
| Square Kilometer [km²] | Chō [chō] |
|---|---|
| 0.01 | 1.0083328628 |
| 0.1 | 10.0833286278 |
| 1 | 100.8332862778 |
| 2 | 201.6665725556 |
| 3 | 302.4998588334 |
| 4 | 403.3331451112 |
| 5 | 504.166431389 |
| 10 | 1008.332862778 |
| 20 | 2016.665725556 |
| 30 | 3024.998588334 |
| 40 | 4033.331451112 |
| 50 | 5041.66431389 |
| 100 | 10083.32862778 |
| 500 | 50416.6431388999 |
| 1000 | 100833.2862777997 |
Frequently asked questions
How many chōs is 1 square kilometer?
How do I convert square kilometers to chōs?
How do I convert chōs back to square kilometers?
How many chōs is 100 square kilometers?
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Metric / SI (15 units)
Imperial / US Customary (15 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Sources & references
Conversion factor (1 km² = 100.8332862778 chō) 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.