Convert Square Foot to Are
Convert square feet to ares instantly. 1 square foot = 0.0009290304 are — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Are to Square Foot converter for the reverse conversion.
Units explained
Square Foot
A square foot is an imperial unit of area equal to exactly 0.09290304 m². It is the dominant unit for real estate area measurement in the United States and is widely used in India for residential property listings.
Derived by squaring the foot. The foot was standardized to exactly 0.3048 m via the 1959 International Yard and Pound Agreement.
Square feet are the standard unit for US real estate floor area, HVAC capacity ratings (BTU per ft²), commercial leasing, and construction. In India, square feet is the dominant unit for residential property advertisements alongside traditional regional units.
Foot dates to ancient civilizations; modern exact value standardized in 1959.
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 Foot to Are conversion formula
The relationship between square feet and ares:
To convert square feet to ares, multiply the value in square feet by 0.0009290304. To reverse, multiply ares by 1076.391041671.
How to use this converter
Type a value into the calculator. The result in ares updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Are to Square Foot converter for the reverse direction.
Step-by-step: convert square feet to ares
- Write down the value in square feet (ft²).
- Multiply that value by the factor 0.0009290304.
- The product is the equivalent value in ares (a).
- To reverse, multiply the are value by 1076.391041671.
Worked examples
Example 1 — Convert 1 ft² to a:
1 × 0.0009290304 = 0.0009290304 a
Example 2 — Convert 100 ft² to a:
100 × 0.0009290304 = 0.09290304 a
Real-world example — Postcard and small-object dimensions
A postcard is about 5 square feet wide. Converting to ares is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 ft² × 0.0009290304 = 0.004645152 a
Real-world example — Ruler-scale measurements
A 30-square foot school ruler converts cleanly to ares — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 ft² × 0.0009290304 = 0.027870912 a
Real-world example — Hardware-scale dimensions
A 10-square foot fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between square feet and ares daily when mixing metric and imperial tools.
10 ft² × 0.0009290304 = 0.009290304 a
Square Foot to Are conversion table
Standard reference values for converting square feet to ares:
| Square Foot [ft²] | Are [a] |
|---|---|
| 0.01 | 9.290304e-6 |
| 0.1 | 9.290304e-5 |
| 1 | 0.0009290304 |
| 2 | 0.0018580608 |
| 3 | 0.0027870912 |
| 4 | 0.0037161216 |
| 5 | 0.004645152 |
| 10 | 0.009290304 |
| 20 | 0.018580608 |
| 30 | 0.027870912 |
| 40 | 0.037161216 |
| 50 | 0.04645152 |
| 100 | 0.09290304 |
| 500 | 0.4645152 |
| 1000 | 0.9290304 |
Frequently asked questions
How many ares is 1 square foot?
How do I convert square feet to ares?
How do I convert ares back to square feet?
How many ares is 100 square feet?
Popular area unit conversions
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Metric / SI (16 units)
Imperial / US Customary (14 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Historical / Pre-metric European (6 units)
Sources & references
Conversion factor (1 ft² = 0.0009290304 a) 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.