Convert Arpent (French) to Dunam (Ottoman)
Convert arpents to dunams instantly. 1 arpent (french) = 3.1551801465 dunam (ottoman) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dunam (Ottoman) to Arpent (French) converter for the reverse conversion.
Units explained
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)
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Traditional Ottoman unit; largely superseded by metric dunam.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) to Dunam (Ottoman) conversion formula
The relationship between arpents and dunams:
To convert arpents to dunams, multiply the value in arpents by 3.1551801465. To reverse, multiply dunams by 0.316939114.
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 Arpent (French) converter for the reverse direction.
Step-by-step: convert arpents to dunams
- Write down the value in arpents (arpent).
- Multiply that value by the factor 3.1551801465.
- The product is the equivalent value in dunams (dunam).
- To reverse, multiply the dunam (ottoman) value by 0.316939114.
Worked examples
Example 1 — Convert 1 arpent to dunam:
1 × 3.1551801465 = 3.1551801465 dunam
Example 2 — Convert 100 arpent to dunam:
100 × 3.1551801465 = 315.5180146509 dunam
Real-world example — Maritime exclusion zone
A 200-arpent (french) 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 arpent × 3.1551801465 = 631.0360293018 dunam
Real-world example — Coastal cruise distances
A 10-arpent (french) 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 arpent × 3.1551801465 = 31.5518014651 dunam
Real-world example — Road-sign distances across systems
A 100-arpent (french) 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 arpent × 3.1551801465 = 315.5180146509 dunam
Arpent (French) to Dunam (Ottoman) conversion table
Standard reference values for converting arpents to dunams:
| Arpent (French) [arpent] | Dunam (Ottoman) [dunam] |
|---|---|
| 0.01 | 0.0315518015 |
| 0.1 | 0.3155180147 |
| 1 | 3.1551801465 |
| 2 | 6.310360293 |
| 3 | 9.4655404395 |
| 4 | 12.620720586 |
| 5 | 15.7759007325 |
| 10 | 31.5518014651 |
| 20 | 63.1036029302 |
| 30 | 94.6554043953 |
| 40 | 126.2072058604 |
| 50 | 157.7590073255 |
| 100 | 315.5180146509 |
| 500 | 1577.5900732546 |
| 1000 | 3155.1801465092 |
Frequently asked questions
How many dunams is 1 arpent (french)?
How do I convert arpents to dunams?
How do I convert dunams back to arpents?
How many dunams is 100 arpents?
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 arpent = 3.1551801465 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 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.