Convert Dunam (Ottoman) to Square Kilometer
Convert dunams to square kilometers instantly. 1 dunam (ottoman) = 0.0013378 square kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Kilometer 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Traditional Ottoman unit; largely superseded by metric dunam.
Square Kilometer
A square kilometer is a metric unit of area equal to 1,000,000 m² (one million square meters), or 100 hectares. It is used for measuring large land areas, regional geography, and country-scale statistics.
Derived by squaring the kilometer (1000 m). The kilo- prefix comes from the Greek 'chilioi' (thousand).
Square kilometers express the area of cities, districts, lakes, forests, and entire countries. India's total area is approximately 3,287,263 km². 1 km² equals 100 hectares or about 247.105 acres.
Kilometer has been part of the metric system since 1795.
Dunam (Ottoman) to Square Kilometer conversion formula
The relationship between dunams and square kilometers:
To convert dunams to square kilometers, multiply the value in dunams by 0.0013378. To reverse, multiply square kilometers by 747.4958887726.
How to use this converter
Type a value into the calculator. The result in square kilometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Kilometer to Dunam (Ottoman) converter for the reverse direction.
Step-by-step: convert dunams to square kilometers
- Write down the value in dunams (dunam).
- Multiply that value by the factor 0.0013378.
- The product is the equivalent value in square kilometers (km²).
- To reverse, multiply the square kilometer value by 747.4958887726.
Worked examples
Example 1 — Convert 1 dunam to km²:
1 × 0.0013378 = 0.0013378 km²
Example 2 — Convert 100 dunam to km²:
100 × 0.0013378 = 0.13378 km²
Real-world example — Coastal cruise distances
A 10-dunam (ottoman) coastal sailing route converts to a different value in square kilometers — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 dunam × 0.0013378 = 0.013378 km²
Real-world example — Road-sign distances across systems
A 100-dunam (ottoman) road sign converts cleanly into square kilometers — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 dunam × 0.0013378 = 0.13378 km²
Real-world example — Endurance race distances
A 50-dunam (ottoman) cycling or running race converts to a recognizable distance in square kilometers. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 dunam × 0.0013378 = 0.06689 km²
Dunam (Ottoman) to Square Kilometer conversion table
Standard reference values for converting dunams to square kilometers:
| Dunam (Ottoman) [dunam] | Square Kilometer [km²] |
|---|---|
| 0.01 | 1.3378e-5 |
| 0.1 | 0.00013378 |
| 1 | 0.0013378 |
| 2 | 0.0026756 |
| 3 | 0.0040134 |
| 4 | 0.0053512 |
| 5 | 0.006689 |
| 10 | 0.013378 |
| 20 | 0.026756 |
| 30 | 0.040134 |
| 40 | 0.053512 |
| 50 | 0.06689 |
| 100 | 0.13378 |
| 500 | 0.6689 |
| 1000 | 1.3378 |
Frequently asked questions
How many square kilometers is 1 dunam (ottoman)?
How do I convert dunams to square kilometers?
How do I convert square kilometers back to dunams?
How many square kilometers 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 = 0.0013378 km²) 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.