Convert Are to Hectare
Convert ares to hectares instantly. 1 are = 0.01 hectare — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectare 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.
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.
Are to Hectare conversion formula
The relationship between ares and hectares:
To convert ares to hectares, multiply the value in ares by 0.01. To reverse, multiply hectares by 100.
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 Are converter for the reverse direction.
Step-by-step: convert ares to hectares
- Write down the value in ares (a).
- Multiply that value by the factor 0.01.
- The product is the equivalent value in hectares (ha).
- To reverse, multiply the hectare value by 100.
Worked examples
Example 1 — Convert 1 a to ha:
1 × 0.01 = 0.01 ha
Example 2 — Convert 100 a to ha:
100 × 0.01 = 1 ha
Are to Hectare conversion table
Standard reference values for converting ares to hectares:
| Are [a] | Hectare [ha] |
|---|---|
| 0.01 | 0.0001 |
| 0.1 | 0.001 |
| 1 | 0.01 |
| 2 | 0.02 |
| 3 | 0.03 |
| 4 | 0.04 |
| 5 | 0.05 |
| 10 | 0.1 |
| 20 | 0.2 |
| 30 | 0.3 |
| 40 | 0.4 |
| 50 | 0.5 |
| 100 | 1 |
| 500 | 5 |
| 1000 | 10 |
Frequently asked questions
How many hectares is 1 are?
How do I convert ares to hectares?
How do I convert hectares back to ares?
How many hectares is 100 ares?
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Metric / SI (15 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 a = 0.01 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 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.