Convert Dunam (Ottoman) to Tsubo
Convert dunams to tsubos instantly. 1 dunam (ottoman) = 404.6826789279 tsubo — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Tsubo 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Traditional Ottoman unit; largely superseded by metric dunam.
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) to Tsubo conversion formula
The relationship between dunams and tsubos:
To convert dunams to tsubos, multiply the value in dunams by 404.6826789279. To reverse, multiply tsubos by 0.0024710719.
How to use this converter
Type a value into the calculator. The result in tsubos updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Tsubo to Dunam (Ottoman) converter for the reverse direction.
Step-by-step: convert dunams to tsubos
- Write down the value in dunams (dunam).
- Multiply that value by the factor 404.6826789279.
- The product is the equivalent value in tsubos (tsubo).
- To reverse, multiply the tsubo value by 0.0024710719.
Worked examples
Example 1 — Convert 1 dunam to tsubo:
1 × 404.6826789279 = 404.6826789279 tsubo
Example 2 — Convert 100 dunam to tsubo:
100 × 404.6826789279 = 40468.2678927945 tsubo
Real-world example — Lap pacing and route segmentation
Translating a dunam (ottoman)-scale distance into tsubos is how runners, cyclists, and route planners convert top-line totals into the working segments they actually pace and execute.
1 dunam × 404.6826789279 = 404.6826789279 tsubo
Real-world example — Track athletics distances
A 1-dunam (ottoman) running track equals one thousand tsubos. Track athletes' lap pacing converts the lap (often 400 of the smaller unit) into the fractional race distance whenever a coach reviews splits.
1 dunam × 404.6826789279 = 404.6826789279 tsubo
Real-world example — Geographic to human-scale conversion
One dunam (ottoman) converts to a precise number of tsubos — the everyday arithmetic for navigation systems, race-distance calculations, and any context where bigger geographic units must be related to the smaller working units.
1 dunam × 404.6826789279 = 404.6826789279 tsubo
Dunam (Ottoman) to Tsubo conversion table
Standard reference values for converting dunams to tsubos:
| Dunam (Ottoman) [dunam] | Tsubo [tsubo] |
|---|---|
| 0.01 | 4.0468267893 |
| 0.1 | 40.4682678928 |
| 1 | 404.6826789279 |
| 2 | 809.3653578559 |
| 3 | 1214.0480367838 |
| 4 | 1618.7307157118 |
| 5 | 2023.4133946397 |
| 10 | 4046.8267892794 |
| 20 | 8093.6535785589 |
| 30 | 12140.4803678383 |
| 40 | 16187.3071571178 |
| 50 | 20234.1339463972 |
| 100 | 40468.2678927945 |
| 500 | 202341.3394639724 |
| 1000 | 404682.6789279448 |
Frequently asked questions
How many tsubos is 1 dunam (ottoman)?
How do I convert dunams to tsubos?
How do I convert tsubos back to dunams?
How many tsubos is 100 dunams?
Popular area unit conversions
Convert Dunam (Ottoman) to other area units
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Other Regional (9 units)
Sources & references
Conversion factor (1 dunam = 404.6826789279 tsubo) 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.