Convert Tan to Dunam (Ottoman)
Convert tan to dunams instantly. 1 tan = 0.7413185827 dunam (ottoman) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dunam (Ottoman) to Tan converter for the reverse conversion.
Units explained
Tan
A tan is a Japanese unit of area equal to approximately 991.74 m². It equals 300 tsubo, or 1/10 chō.
Traditional Japanese agricultural unit. The tan was the standard rice paddy size in pre-modern Japan.
Tan appears in Japanese rural property records and historical land descriptions. Used alongside chō and tsubo in Japanese agricultural documentation.
Traditional Japanese unit; standardized via the tsubo definition.
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Traditional Ottoman unit; largely superseded by metric dunam.
Tan to Dunam (Ottoman) conversion formula
The relationship between tan and dunams:
To convert tan to dunams, multiply the value in tan by 0.7413185827. To reverse, multiply dunams by 1.3489477038.
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 Tan converter for the reverse direction.
Step-by-step: convert tan to dunams
- Write down the value in tan (tan).
- Multiply that value by the factor 0.7413185827.
- The product is the equivalent value in dunams (dunam).
- To reverse, multiply the dunam (ottoman) value by 1.3489477038.
Worked examples
Example 1 — Convert 1 tan to dunam:
1 × 0.7413185827 = 0.7413185827 dunam
Example 2 — Convert 100 tan to dunam:
100 × 0.7413185827 = 74.1318582748 dunam
Tan to Dunam (Ottoman) conversion table
Standard reference values for converting tan to dunams:
| Tan [tan] | Dunam (Ottoman) [dunam] |
|---|---|
| 0.01 | 0.0074131858 |
| 0.1 | 0.0741318583 |
| 1 | 0.7413185827 |
| 2 | 1.4826371655 |
| 3 | 2.2239557482 |
| 4 | 2.965274331 |
| 5 | 3.7065929137 |
| 10 | 7.4131858275 |
| 20 | 14.826371655 |
| 30 | 22.2395574824 |
| 40 | 29.6527433099 |
| 50 | 37.0659291374 |
| 100 | 74.1318582748 |
| 500 | 370.6592913739 |
| 1000 | 741.3185827478 |
Frequently asked questions
How many dunams is 1 tan?
How do I convert tan to dunams?
How do I convert dunams back to tan?
How many dunams is 100 tan?
Popular area unit conversions
Convert Tan to other area units
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 tan = 0.7413185827 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.