Convert Dunam (Ottoman) to Arpent (French)
Convert dunams to arpents instantly. 1 dunam (ottoman) = 0.316939114 arpent (french) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Arpent (French) 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Traditional Ottoman unit; largely superseded by metric dunam.
Arpent (French)
A French arpent is a historical unit of land area used in pre-metric France, approximately 4221 m² (close to one acre).
Originated as a medieval French land unit; varied considerably by province. The 'arpent de Paris' was officially fixed at 100 perches squared, the perche being 18 pieds.
French arpents appear in pre-revolutionary French land records and in genealogical research. The unit was largely abolished after the French Revolution in favor of metric units.
Medieval French origin; abolished after the French Revolution in favor of metric.
Dunam (Ottoman) to Arpent (French) conversion formula
The relationship between dunams and arpents:
To convert dunams to arpents, multiply the value in dunams by 0.316939114. To reverse, multiply arpents by 3.1551801465.
How to use this converter
Type a value into the calculator. The result in arpents updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Arpent (French) to Dunam (Ottoman) converter for the reverse direction.
Step-by-step: convert dunams to arpents
- Write down the value in dunams (dunam).
- Multiply that value by the factor 0.316939114.
- The product is the equivalent value in arpents (arpent).
- To reverse, multiply the arpent (french) value by 3.1551801465.
Worked examples
Example 1 — Convert 1 dunam to arpent:
1 × 0.316939114 = 0.316939114 arpent
Example 2 — Convert 100 dunam to arpent:
100 × 0.316939114 = 31.6939113954 arpent
Real-world example — Maritime exclusion zone
A 200-dunam (ottoman) exclusion zone (a common maritime boundary) converts to a different value in arpents that's useful when describing the same zone in everyday land-distance units.
200 dunam × 0.316939114 = 63.3878227908 arpent
Real-world example — Coastal cruise distances
A 10-dunam (ottoman) coastal sailing route converts to a different value in arpents — useful for cruise operators who switch between maritime, aviation, and road-distance units depending on the leg of the trip.
10 dunam × 0.316939114 = 3.1693911395 arpent
Real-world example — Road-sign distances across systems
A 100-dunam (ottoman) road sign converts cleanly into arpents — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 dunam × 0.316939114 = 31.6939113954 arpent
Dunam (Ottoman) to Arpent (French) conversion table
Standard reference values for converting dunams to arpents:
| Dunam (Ottoman) [dunam] | Arpent (French) [arpent] |
|---|---|
| 0.01 | 0.0031693911 |
| 0.1 | 0.0316939114 |
| 1 | 0.316939114 |
| 2 | 0.6338782279 |
| 3 | 0.9508173419 |
| 4 | 1.2677564558 |
| 5 | 1.5846955698 |
| 10 | 3.1693911395 |
| 20 | 6.3387822791 |
| 30 | 9.5081734186 |
| 40 | 12.6775645582 |
| 50 | 15.8469556977 |
| 100 | 31.6939113954 |
| 500 | 158.469556977 |
| 1000 | 316.939113954 |
Frequently asked questions
How many arpents is 1 dunam (ottoman)?
How do I convert dunams to arpents?
How do I convert arpents back to dunams?
How many arpents 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 = 0.316939114 arpent) 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.