Convert Dunam (Metric) to Chō
Convert dunams to chōs instantly. 1 dunam (metric) = 0.1008332863 chō — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Chō to Dunam (Metric) converter for the reverse conversion.
Units explained
Dunam (Metric)
A metric dunam is a unit of land area equal to exactly 1000 m² (0.1 hectare or about 0.247 acre). Used widely in Israel, Turkey, and the Middle East.
Originally an Ottoman unit of variable size (see Ottoman dunam). The metric dunam was standardized at exactly 1000 m² in the 20th century for ease of conversion.
Metric dunams are the standard land measurement unit in Israel for both residential and agricultural property. Also widely used in Turkey, Cyprus, and other former Ottoman territories.
Standardized at 1000 m² in 20th century; Ottoman origin.
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.
Dunam (Metric) to Chō conversion formula
The relationship between dunams and chōs:
To convert dunams to chōs, multiply the value in dunams by 0.1008332863. To reverse, multiply chōs by 9.91736.
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 Dunam (Metric) converter for the reverse direction.
Step-by-step: convert dunams to chōs
- Write down the value in dunams (dunam).
- Multiply that value by the factor 0.1008332863.
- The product is the equivalent value in chōs (chō).
- To reverse, multiply the chō value by 9.91736.
Worked examples
Example 1 — Convert 1 dunam to chō:
1 × 0.1008332863 = 0.1008332863 chō
Example 2 — Convert 100 dunam to chō:
100 × 0.1008332863 = 10.0833286278 chō
Real-world example — Maritime exclusion zone
A 200-dunam (metric) exclusion zone (a common maritime boundary) converts to a different value in chōs that's useful when describing the same zone in everyday land-distance units.
200 dunam × 0.1008332863 = 20.1666572556 chō
Real-world example — Coastal cruise distances
A 10-dunam (metric) coastal sailing route converts to a different value in chōs — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 dunam × 0.1008332863 = 1.0083328628 chō
Real-world example — Road-sign distances across systems
A 100-dunam (metric) road sign converts cleanly into chōs — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 dunam × 0.1008332863 = 10.0833286278 chō
Dunam (Metric) to Chō conversion table
Standard reference values for converting dunams to chōs:
| Dunam (Metric) [dunam] | Chō [chō] |
|---|---|
| 0.01 | 0.0010083329 |
| 0.1 | 0.0100833286 |
| 1 | 0.1008332863 |
| 2 | 0.2016665726 |
| 3 | 0.3024998588 |
| 4 | 0.4033331451 |
| 5 | 0.5041664314 |
| 10 | 1.0083328628 |
| 20 | 2.0166657256 |
| 30 | 3.0249985883 |
| 40 | 4.0333314511 |
| 50 | 5.0416643139 |
| 100 | 10.0833286278 |
| 500 | 50.4166431389 |
| 1000 | 100.8332862778 |
Frequently asked questions
How many chōs is 1 dunam (metric)?
How do I convert dunams to chōs?
How do I convert chōs back to dunams?
How many chōs is 100 dunams?
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Imperial / US Customary (3 units)
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Sources & references
Conversion factor (1 dunam = 0.1008332863 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.