Convert Dunam (Ottoman) to Dunam (Metric)
Convert dunams to dunams instantly. 1 dunam (ottoman) = 1.3378 dunam (metric) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dunam (Metric) 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Traditional Ottoman unit; largely superseded by metric dunam.
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.
Dunam (Ottoman) to Dunam (Metric) conversion formula
The relationship between dunams and dunams:
To convert dunams to dunams, multiply the value in dunams by 1.3378. To reverse, multiply dunams by 0.7474958888.
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 (Metric) to Dunam (Ottoman) converter for the reverse direction.
Step-by-step: convert dunams to dunams
- Write down the value in dunams (dunam).
- Multiply that value by the factor 1.3378.
- The product is the equivalent value in dunams (dunam).
- To reverse, multiply the dunam (metric) value by 0.7474958888.
Worked examples
Example 1 — Convert 1 dunam to dunam:
1 × 1.3378 = 1.3378 dunam
Example 2 — Convert 100 dunam to dunam:
100 × 1.3378 = 133.78 dunam
Real-world example — Coastal cruise distances
A 10-dunam (ottoman) 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 dunam × 1.3378 = 13.378 dunam
Real-world example — Road-sign distances across systems
A 100-dunam (ottoman) road sign converts cleanly into dunams — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 dunam × 1.3378 = 133.78 dunam
Real-world example — Endurance race distances
A 50-dunam (ottoman) 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 dunam × 1.3378 = 66.89 dunam
Dunam (Ottoman) to Dunam (Metric) conversion table
Standard reference values for converting dunams to dunams:
| Dunam (Ottoman) [dunam] | Dunam (Metric) [dunam] |
|---|---|
| 0.01 | 0.013378 |
| 0.1 | 0.13378 |
| 1 | 1.3378 |
| 2 | 2.6756 |
| 3 | 4.0134 |
| 4 | 5.3512 |
| 5 | 6.689 |
| 10 | 13.378 |
| 20 | 26.756 |
| 30 | 40.134 |
| 40 | 53.512 |
| 50 | 66.89 |
| 100 | 133.78 |
| 500 | 668.9 |
| 1000 | 1337.8 |
Frequently asked questions
How many dunams is 1 dunam (ottoman)?
How do I convert dunams to dunams?
How do I convert dunams back to dunams?
How many dunams is 100 dunams?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Other Regional (9 units)
Sources & references
Conversion factor (1 dunam = 1.3378 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.