Convert Are to Square Decimeter
Convert ares to square decimeters instantly. 1 are = 10000 square decimeter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Decimeter to Are converter for the reverse conversion.
Units explained
Are
An are is a metric unit of area equal to 100 square meters. It is used in some European countries for land measurement, especially for smaller plots like vineyards and gardens.
Introduced as part of the French metric system in 1795. The name comes from the Latin 'area' meaning surface or open ground.
Ares are still used in some European countries (especially Switzerland and France) for small-plot land measurement. In Switzerland, an are is a common unit for vineyard size. Most modern contexts prefer square meters or hectares.
Defined in 1795 in France as part of the original metric system.
Square Decimeter
A square decimeter is a metric unit of area equal to 0.01 m². It is rarely used in everyday measurement but exists for SI completeness and appears in some scientific contexts.
Derived by squaring the decimeter (1/10 of a meter). The deci- prefix comes from the Latin 'decimus' (tenth).
Square decimeters appear in some scientific contexts and in regions where the decimeter itself is used. Most everyday applications would use cm² or m² instead.
Decimeter has been part of the metric system since 1795.
Are to Square Decimeter conversion formula
The relationship between ares and square decimeters:
To convert ares to square decimeters, multiply the value in ares by 10000. To reverse, multiply square decimeters by 0.0001.
How to use this converter
Type a value into the calculator. The result in square decimeters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Decimeter to Are converter for the reverse direction.
Step-by-step: convert ares to square decimeters
- Write down the value in ares (a).
- Multiply that value by the factor 10000.
- The product is the equivalent value in square decimeters (dm²).
- To reverse, multiply the square decimeter value by 0.0001.
Worked examples
Example 1 — Convert 1 a to dm²:
1 × 10000 = 10000 dm²
Example 2 — Convert 100 a to dm²:
100 × 10000 = 1000000 dm²
Are to Square Decimeter conversion table
Standard reference values for converting ares to square decimeters:
| Are [a] | Square Decimeter [dm²] |
|---|---|
| 0.01 | 100 |
| 0.1 | 1000 |
| 1 | 10000 |
| 2 | 20000 |
| 3 | 30000 |
| 4 | 40000 |
| 5 | 50000 |
| 10 | 100000 |
| 20 | 200000 |
| 30 | 300000 |
| 40 | 400000 |
| 50 | 500000 |
| 100 | 1000000 |
| 500 | 5000000 |
| 1000 | 1e+7 |
Frequently asked questions
How many square decimeters is 1 are?
How do I convert ares to square decimeters?
How do I convert square decimeters back to ares?
How many square decimeters is 100 ares?
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Sources & references
Conversion factor (1 a = 10000 dm²) 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.