Convert Are to Square Attometer
Convert ares to square attometers instantly. 1 are = 1e+38 square attometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Attometer 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 Attometer
A square attometer is a metric unit of area equal to 10⁻³⁶ m². It is used in theoretical particle physics when discussing cross-sections at the sub-femtometer scale.
Derived by squaring the attometer (10⁻¹⁸ m). The atto- prefix was adopted by the CGPM in 1964 from the Danish 'atten' (eighteen), denoting 10⁻¹⁸.
Square attometers can appear in particle physics literature comparing extremely small interaction cross-sections, though more often barns (10⁻²⁸ m²) are used at this scale.
SI prefix atto- adopted in 1964; remains a defined unit, rarely used in practice.
Are to Square Attometer conversion formula
The relationship between ares and square attometers:
To convert ares to square attometers, multiply the value in ares by 1e+38. To reverse, multiply square attometers by 1e-38.
How to use this converter
Type a value into the calculator. The result in square attometers 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 Attometer to Are converter for the reverse direction.
Step-by-step: convert ares to square attometers
- Write down the value in ares (a).
- Multiply that value by the factor 1e+38.
- The product is the equivalent value in square attometers (am²).
- To reverse, multiply the square attometer value by 1e-38.
Worked examples
Example 1 — Convert 1 a to am²:
1 × 1e+38 = 1e+38 am²
Example 2 — Convert 100 a to am²:
100 × 1e+38 = 1e+40 am²
Are to Square Attometer conversion table
Standard reference values for converting ares to square attometers:
| Are [a] | Square Attometer [am²] |
|---|---|
| 0.01 | 1e+36 |
| 0.1 | 1e+37 |
| 1 | 1e+38 |
| 2 | 2e+38 |
| 3 | 3e+38 |
| 4 | 4e+38 |
| 5 | 5e+38 |
| 10 | 1e+39 |
| 20 | 2e+39 |
| 30 | 3e+39 |
| 40 | 4e+39 |
| 50 | 5e+39 |
| 100 | 1e+40 |
| 500 | 5e+40 |
| 1000 | 1e+41 |
Frequently asked questions
How many square attometers is 1 are?
How do I convert ares to square attometers?
How do I convert square attometers back to ares?
How many square attometers is 100 ares?
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Metric / SI (15 units)
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Sources & references
Conversion factor (1 a = 1e+38 am²) 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.