Convert Feddan to Chō
Convert feddans to chōs instantly. 1 feddan = 0.423583494 chō — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Chō to Feddan converter for the reverse conversion.
Units explained
Feddan
A feddan is an Egyptian unit of land area equal to approximately 4200.83 m² (about 1.038 acres). Used in Egypt, Sudan, Syria, and Oman.
Originated as an Egyptian agricultural unit. Standardized at 4200.83 m² in modern Egyptian law (specifically, 333.33 qasaba squared).
Feddans are the primary unit for agricultural land in Egypt and several Arab countries. The conversion to hectares (1 feddan ≈ 0.42 hectare) is widely known regionally.
Standardized in modern Egyptian land law.
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.
Feddan to Chō conversion formula
The relationship between feddans and chōs:
To convert feddans to chōs, multiply the value in feddans by 0.423583494. To reverse, multiply chōs by 2.3608096495.
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 Feddan converter for the reverse direction.
Step-by-step: convert feddans to chōs
- Write down the value in feddans (feddan).
- Multiply that value by the factor 0.423583494.
- The product is the equivalent value in chōs (chō).
- To reverse, multiply the chō value by 2.3608096495.
Worked examples
Example 1 — Convert 1 feddan to chō:
1 × 0.423583494 = 0.423583494 chō
Example 2 — Convert 100 feddan to chō:
100 × 0.423583494 = 42.3583493994 chō
Real-world example — Maritime exclusion zone
A 200-feddan 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 feddan × 0.423583494 = 84.7166987989 chō
Real-world example — Coastal cruise distances
A 10-feddan 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 feddan × 0.423583494 = 4.2358349399 chō
Real-world example — Road-sign distances across systems
A 100-feddan 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 feddan × 0.423583494 = 42.3583493994 chō
Feddan to Chō conversion table
Standard reference values for converting feddans to chōs:
| Feddan [feddan] | Chō [chō] |
|---|---|
| 0.01 | 0.0042358349 |
| 0.1 | 0.0423583494 |
| 1 | 0.423583494 |
| 2 | 0.847166988 |
| 3 | 1.270750482 |
| 4 | 1.694333976 |
| 5 | 2.11791747 |
| 10 | 4.2358349399 |
| 20 | 8.4716698799 |
| 30 | 12.7075048198 |
| 40 | 16.9433397598 |
| 50 | 21.1791746997 |
| 100 | 42.3583493994 |
| 500 | 211.7917469972 |
| 1000 | 423.5834939944 |
Frequently asked questions
How many chōs is 1 feddan?
How do I convert feddans to chōs?
How do I convert chōs back to feddans?
How many chōs is 100 feddans?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 feddan = 0.423583494 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.