Convert Chō to Tan
Convert chōs to tan instantly. 1 chō = 10 tan — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Tan to Chō converter for the reverse conversion.
Units explained
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
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 to Tan conversion formula
The relationship between chōs and tan:
To convert chōs to tan, multiply the value in chōs by 10. To reverse, multiply tan by 0.1.
How to use this converter
Type a value into the calculator. The result in tan updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Tan to Chō converter for the reverse direction.
Step-by-step: convert chōs to tan
- Write down the value in chōs (chō).
- Multiply that value by the factor 10.
- The product is the equivalent value in tan (tan).
- To reverse, multiply the tan value by 0.1.
Worked examples
Example 1 — Convert 1 chō to tan:
1 × 10 = 10 tan
Example 2 — Convert 100 chō to tan:
100 × 10 = 1000 tan
Real-world example — Maritime exclusion zone
A 200-chō exclusion zone (a common maritime boundary) converts to a different value in tan that's useful when describing the same zone in everyday land-distance units.
200 chō × 10 = 2000 tan
Real-world example — Coastal cruise distances
A 10-chō coastal sailing route converts to a different value in tan — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 chō × 10 = 100 tan
Real-world example — Road-sign distances across systems
A 100-chō road sign converts cleanly into tan — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 chō × 10 = 1000 tan
Chō to Tan conversion table
Standard reference values for converting chōs to tan:
| Chō [chō] | Tan [tan] |
|---|---|
| 0.01 | 0.1 |
| 0.1 | 1 |
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 4 | 40 |
| 5 | 50 |
| 10 | 100 |
| 20 | 200 |
| 30 | 300 |
| 40 | 400 |
| 50 | 500 |
| 100 | 1000 |
| 500 | 5000 |
| 1000 | 10000 |
Frequently asked questions
How many tan is 1 chō?
How do I convert chōs to tan?
How do I convert tan back to chōs?
How many tan is 100 chōs?
Popular area unit conversions
Convert Chō to other area units
Show all Chō conversions
Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 chō = 10 tan) 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.