Convert Tsubo to Dunam (Ottoman)
Convert tsubos to dunams instantly. 1 tsubo = 0.0024710719 dunam (ottoman) — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Dunam (Ottoman) to Tsubo converter for the reverse conversion.
Units explained
Tsubo
A tsubo is a Japanese unit of area equal to approximately 3.3058 m² (about 35.58 square feet). It is functionally identical to the Korean pyeong.
Defined as a 6-by-6 shaku square; the shaku is the traditional Japanese foot. Standardized as 400/121 m² in modern Japanese law.
Tsubos remain in widespread use in Japanese real estate, particularly for residential apartments and small commercial spaces. Property listings often cite both tsubo and square meters.
Traditional Japanese unit; legally retained in Japan for real estate.
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Traditional Ottoman unit; largely superseded by metric dunam.
Tsubo to Dunam (Ottoman) conversion formula
The relationship between tsubos and dunams:
To convert tsubos to dunams, multiply the value in tsubos by 0.0024710719. To reverse, multiply dunams by 404.6826789279.
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 Tsubo converter for the reverse direction.
Step-by-step: convert tsubos to dunams
- Write down the value in tsubos (tsubo).
- Multiply that value by the factor 0.0024710719.
- The product is the equivalent value in dunams (dunam).
- To reverse, multiply the dunam (ottoman) value by 404.6826789279.
Worked examples
Example 1 — Convert 1 tsubo to dunam:
1 × 0.0024710719 = 0.0024710719 dunam
Example 2 — Convert 100 tsubo to dunam:
100 × 0.0024710719 = 0.2471071909 dunam
Real-world example — Metric distance scale-up
One thousand tsubos equals one dunam (ottoman) — the running distance for a 1K race or the standard metric kilometre-scale step. The simple thousand-fold conversion is the most-used metric distance translation.
1000 tsubo × 0.0024710719 = 2.4710719091 dunam
Real-world example — Imperial mile arithmetic
5,280 tsubos equals exactly one dunam (ottoman). American hikers tracking elevation gain in the smaller unit but trail length in the larger one use this constant every time they read a topographic map.
5280 tsubo × 0.0024710719 = 13.0472596801 dunam
Real-world example — Imperial yard-to-mile scale
1,760 tsubos equals exactly one dunam (ottoman). American athletes and surveyors use this conversion to translate distances quoted in the smaller imperial unit into recognizable fractions of the larger geographic one.
1760 tsubo × 0.0024710719 = 4.34908656 dunam
Tsubo to Dunam (Ottoman) conversion table
Standard reference values for converting tsubos to dunams:
| Tsubo [tsubo] | Dunam (Ottoman) [dunam] |
|---|---|
| 0.01 | 2.471072e-5 |
| 0.1 | 0.0002471072 |
| 1 | 0.0024710719 |
| 2 | 0.0049421438 |
| 3 | 0.0074132157 |
| 4 | 0.0098842876 |
| 5 | 0.0123553595 |
| 10 | 0.0247107191 |
| 20 | 0.0494214382 |
| 30 | 0.0741321573 |
| 40 | 0.0988428764 |
| 50 | 0.1235535955 |
| 100 | 0.2471071909 |
| 500 | 1.2355359546 |
| 1000 | 2.4710719091 |
Frequently asked questions
How many dunams is 1 tsubo?
How do I convert tsubos to dunams?
How do I convert dunams back to tsubos?
How many dunams is 100 tsubos?
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 tsubo = 0.0024710719 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.