Convert Dunam (Ottoman) to Feddan
Convert dunams to feddans instantly. 1 dunam (ottoman) = 0.3184608756 feddan — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Feddan to Dunam (Ottoman) converter for the reverse conversion.
Units explained
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Traditional Ottoman unit; largely superseded by metric dunam.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
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) to Feddan conversion formula
The relationship between dunams and feddans:
To convert dunams to feddans, multiply the value in dunams by 0.3184608756. To reverse, multiply feddans by 3.1401031544.
How to use this converter
Type a value into the calculator. The result in feddans updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Feddan to Dunam (Ottoman) converter for the reverse direction.
Step-by-step: convert dunams to feddans
- Write down the value in dunams (dunam).
- Multiply that value by the factor 0.3184608756.
- The product is the equivalent value in feddans (feddan).
- To reverse, multiply the feddan value by 3.1401031544.
Worked examples
Example 1 — Convert 1 dunam to feddan:
1 × 0.3184608756 = 0.3184608756 feddan
Example 2 — Convert 100 dunam to feddan:
100 × 0.3184608756 = 31.8460875589 feddan
Real-world example — Coastal cruise distances
A 10-dunam (ottoman) coastal sailing route converts to a different value in feddans — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 dunam × 0.3184608756 = 3.1846087559 feddan
Real-world example — Road-sign distances across systems
A 100-dunam (ottoman) road sign converts cleanly into feddans — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 dunam × 0.3184608756 = 31.8460875589 feddan
Real-world example — Endurance race distances
A 50-dunam (ottoman) cycling or running race converts to a recognizable distance in feddans. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 dunam × 0.3184608756 = 15.9230437794 feddan
Dunam (Ottoman) to Feddan conversion table
Standard reference values for converting dunams to feddans:
| Dunam (Ottoman) [dunam] | Feddan [feddan] |
|---|---|
| 0.01 | 0.0031846088 |
| 0.1 | 0.0318460876 |
| 1 | 0.3184608756 |
| 2 | 0.6369217512 |
| 3 | 0.9553826268 |
| 4 | 1.2738435024 |
| 5 | 1.5923043779 |
| 10 | 3.1846087559 |
| 20 | 6.3692175118 |
| 30 | 9.5538262677 |
| 40 | 12.7384350236 |
| 50 | 15.9230437794 |
| 100 | 31.8460875589 |
| 500 | 159.2304377944 |
| 1000 | 318.4608755889 |
Frequently asked questions
How many feddans is 1 dunam (ottoman)?
How do I convert dunams to feddans?
How do I convert feddans back to dunams?
How many feddans is 100 dunams?
Popular area unit conversions
Convert Dunam (Ottoman) to other area units
Show all Dunam (Ottoman) conversions
Metric / SI (5 units)
Imperial / US Customary (3 units)
Other Regional (9 units)
Sources & references
Conversion factor (1 dunam = 0.3184608756 feddan) 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.