Convert Feddan to Tan
Convert feddans to tan instantly. 1 feddan = 4.2358349399 tan — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Tan 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.
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.
Feddan to Tan conversion formula
The relationship between feddans and tan:
To convert feddans to tan, multiply the value in feddans by 4.2358349399. To reverse, multiply tan by 0.236080965.
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 Feddan converter for the reverse direction.
Step-by-step: convert feddans to tan
- Write down the value in feddans (feddan).
- Multiply that value by the factor 4.2358349399.
- The product is the equivalent value in tan (tan).
- To reverse, multiply the tan value by 0.236080965.
Worked examples
Example 1 — Convert 1 feddan to tan:
1 × 4.2358349399 = 4.2358349399 tan
Example 2 — Convert 100 feddan to tan:
100 × 4.2358349399 = 423.5834939944 tan
Real-world example — Maritime exclusion zone
A 200-feddan 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 feddan × 4.2358349399 = 847.1669879887 tan
Real-world example — Coastal cruise distances
A 10-feddan 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 feddan × 4.2358349399 = 42.3583493994 tan
Real-world example — Road-sign distances across systems
A 100-feddan 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 feddan × 4.2358349399 = 423.5834939944 tan
Feddan to Tan conversion table
Standard reference values for converting feddans to tan:
| Feddan [feddan] | Tan [tan] |
|---|---|
| 0.01 | 0.0423583494 |
| 0.1 | 0.423583494 |
| 1 | 4.2358349399 |
| 2 | 8.4716698799 |
| 3 | 12.7075048198 |
| 4 | 16.9433397598 |
| 5 | 21.1791746997 |
| 10 | 42.3583493994 |
| 20 | 84.7166987989 |
| 30 | 127.0750481983 |
| 40 | 169.4333975977 |
| 50 | 211.7917469972 |
| 100 | 423.5834939944 |
| 500 | 2117.9174699718 |
| 1000 | 4235.8349399437 |
Frequently asked questions
How many tan is 1 feddan?
How do I convert feddans to tan?
How do I convert tan back to feddans?
How many tan is 100 feddans?
Popular area unit conversions
Convert Feddan to other area units
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 feddan = 4.2358349399 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.