Convert Tan to Hectare
Convert tan to hectares instantly. 1 tan = 0.0991736 hectare — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectare 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.
Hectare
A hectare is a metric unit of area equal to 10,000 square meters, or one square hectometer. It is the most widely used metric unit for land measurement worldwide.
Defined as 100 ares, equal to one square hectometer. The name was introduced in 1795 in France as part of the metric system.
Hectares are the standard unit for agricultural land measurement worldwide except in the US (which uses acres). 1 hectare equals 2.47105 acres. In India, hectares are used in modern agricultural census and land records alongside traditional regional units.
Adopted in France in 1795; standardized internationally through the SI system.
Tan to Hectare conversion formula
The relationship between tan and hectares:
To convert tan to hectares, multiply the value in tan by 0.0991736. To reverse, multiply hectares by 10.0833286278.
How to use this converter
Type a value into the calculator. The result in hectares updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hectare to Tan converter for the reverse direction.
Step-by-step: convert tan to hectares
- Write down the value in tan (tan).
- Multiply that value by the factor 0.0991736.
- The product is the equivalent value in hectares (ha).
- To reverse, multiply the hectare value by 10.0833286278.
Worked examples
Example 1 — Convert 1 tan to ha:
1 × 0.0991736 = 0.0991736 ha
Example 2 — Convert 100 tan to ha:
100 × 0.0991736 = 9.91736 ha
Tan to Hectare conversion table
Standard reference values for converting tan to hectares:
| Tan [tan] | Hectare [ha] |
|---|---|
| 0.01 | 0.000991736 |
| 0.1 | 0.00991736 |
| 1 | 0.0991736 |
| 2 | 0.1983472 |
| 3 | 0.2975208 |
| 4 | 0.3966944 |
| 5 | 0.495868 |
| 10 | 0.991736 |
| 20 | 1.983472 |
| 30 | 2.975208 |
| 40 | 3.966944 |
| 50 | 4.95868 |
| 100 | 9.91736 |
| 500 | 49.5868 |
| 1000 | 99.1736 |
Frequently asked questions
How many hectares is 1 tan?
How do I convert tan to hectares?
How do I convert hectares back to tan?
How many hectares is 100 tan?
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 tan = 0.0991736 ha) 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.