Convert Feddan to Dunam (Ottoman)
Convert feddans to dunams instantly. 1 feddan = 3.1401031544 dunam (ottoman) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dunam (Ottoman) 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.
Dunam (Ottoman)
An Ottoman dunam was a historical unit of area used across the Ottoman Empire, approximately 1337.8 m². The value varied somewhat by region.
Originated as the area a yoke of oxen could plow in a day, a measure used across much of the Mediterranean. Standardized in different regional ways.
Ottoman dunams appear in pre-20th-century land records across the former Ottoman Empire. Modern usage has shifted to metric dunams (exactly 1000 m²).
Traditional Ottoman unit; largely superseded by metric dunam.
Feddan to Dunam (Ottoman) conversion formula
The relationship between feddans and dunams:
To convert feddans to dunams, multiply the value in feddans by 3.1401031544. To reverse, multiply dunams by 0.3184608756.
How to use this converter
Type a value into the calculator. The result in dunams updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Dunam (Ottoman) to Feddan converter for the reverse direction.
Step-by-step: convert feddans to dunams
- Write down the value in feddans (feddan).
- Multiply that value by the factor 3.1401031544.
- The product is the equivalent value in dunams (dunam).
- To reverse, multiply the dunam (ottoman) value by 0.3184608756.
Worked examples
Example 1 — Convert 1 feddan to dunam:
1 × 3.1401031544 = 3.1401031544 dunam
Example 2 — Convert 100 feddan to dunam:
100 × 3.1401031544 = 314.0103154433 dunam
Real-world example — Endurance race distances
A 50-feddan cycling or running race converts to a recognizable distance in dunams. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 feddan × 3.1401031544 = 157.0051577216 dunam
Real-world example — Maritime exclusion zone
A 200-feddan exclusion zone (a common maritime boundary) converts to a different value in dunams that's useful when describing the same zone in everyday land-distance units.
200 feddan × 3.1401031544 = 628.0206308865 dunam
Real-world example — Coastal cruise distances
A 10-feddan coastal sailing route converts to a different value in dunams — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 feddan × 3.1401031544 = 31.4010315443 dunam
Feddan to Dunam (Ottoman) conversion table
Standard reference values for converting feddans to dunams:
| Feddan [feddan] | Dunam (Ottoman) [dunam] |
|---|---|
| 0.01 | 0.0314010315 |
| 0.1 | 0.3140103154 |
| 1 | 3.1401031544 |
| 2 | 6.2802063089 |
| 3 | 9.4203094633 |
| 4 | 12.5604126177 |
| 5 | 15.7005157722 |
| 10 | 31.4010315443 |
| 20 | 62.8020630887 |
| 30 | 94.203094633 |
| 40 | 125.6041261773 |
| 50 | 157.0051577216 |
| 100 | 314.0103154433 |
| 500 | 1570.0515772163 |
| 1000 | 3140.1031544327 |
Frequently asked questions
How many dunams is 1 feddan?
How do I convert feddans to dunams?
How do I convert dunams back to feddans?
How many dunams 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 = 3.1401031544 dunam) 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.