Convert Tan to Chō
Convert tan to chōs instantly. 1 tan = 0.1 chō — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Chō to Tan converter for the reverse conversion.
Units explained
Tan
A tan is a Japanese unit of area equal to approximately 991.74 m². It equals 300 tsubo, or 1/10 chō.
Traditional Japanese agricultural unit. The tan was the standard rice paddy size in pre-modern Japan.
Tan appears in Japanese rural property records and historical land descriptions. Used alongside chō and tsubo in Japanese agricultural documentation.
Traditional Japanese unit; standardized via the tsubo definition.
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.
Tan to Chō conversion formula
The relationship between tan and chōs:
To convert tan to chōs, multiply the value in tan by 0.1. To reverse, multiply chōs by 10.
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 Tan converter for the reverse direction.
Step-by-step: convert tan to chōs
- Write down the value in tan (tan).
- Multiply that value by the factor 0.1.
- The product is the equivalent value in chōs (chō).
- To reverse, multiply the chō value by 10.
Worked examples
Example 1 — Convert 1 tan to chō:
1 × 0.1 = 0.1 chō
Example 2 — Convert 100 tan to chō:
100 × 0.1 = 10 chō
Tan to Chō conversion table
Standard reference values for converting tan to chōs:
| Tan [tan] | Chō [chō] |
|---|---|
| 0.01 | 0.001 |
| 0.1 | 0.01 |
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.3 |
| 4 | 0.4 |
| 5 | 0.5 |
| 10 | 1 |
| 20 | 2 |
| 30 | 3 |
| 40 | 4 |
| 50 | 5 |
| 100 | 10 |
| 500 | 50 |
| 1000 | 100 |
Frequently asked questions
How many chōs is 1 tan?
How do I convert tan to chōs?
How do I convert chōs back to tan?
How many chōs is 100 tan?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 tan = 0.1 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 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.