Convert Square Foot to Feddan
Convert square feet to feddans instantly. 1 square foot = 2.21154e-5 feddan — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Feddan 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.
Feddan
A feddan is an Egyptian unit of land area equal to approximately 4200.83 m² (about 1.038 acres). Used in Egypt, Sudan, Syria, and Oman.
Originated as an Egyptian agricultural unit. Standardized at 4200.83 m² in modern Egyptian law (specifically, 333.33 qasaba squared).
Feddans are the primary unit for agricultural land in Egypt and several Arab countries. The conversion to hectares (1 feddan ≈ 0.42 hectare) is widely known regionally.
Standardized in modern Egyptian land law.
Square Foot to Feddan conversion formula
The relationship between square feet and feddans:
To convert square feet to feddans, multiply the value in square feet by 2.21154e-5. To reverse, multiply feddans by 45217.3577958267.
How to use this converter
Type a value into the calculator. The result in feddans updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Feddan to Square Foot converter for the reverse direction.
Step-by-step: convert square feet to feddans
- Write down the value in square feet (ft²).
- Multiply that value by the factor 2.21154e-5.
- The product is the equivalent value in feddans (feddan).
- To reverse, multiply the feddan value by 45217.3577958267.
Worked examples
Example 1 — Convert 1 ft² to feddan:
1 × 2.21154e-5 = 2.21154e-5 feddan
Example 2 — Convert 100 ft² to feddan:
100 × 2.21154e-5 = 0.0022115401 feddan
Real-world example — Small to geographic-scale
100,000 square feet equals one feddan — a useful conversion when small-scale survey diagrams must be related to road-network distances on a different map.
100000 ft² × 2.21154e-5 = 2.2115401004 feddan
Real-world example — Architectural to geographic scale
A 100,000-square foot measurement equals one feddan. The five-order-of-magnitude scale change comes up in mapping work where architectural site plans must be related to road-network maps.
100000 ft² × 2.21154e-5 = 2.2115401004 feddan
Square Foot to Feddan conversion table
Standard reference values for converting square feet to feddans:
| Square Foot [ft²] | Feddan [feddan] |
|---|---|
| 0.01 | 2.21154e-7 |
| 0.1 | 2.21154e-6 |
| 1 | 2.21154e-5 |
| 2 | 4.42308e-5 |
| 3 | 6.63462e-5 |
| 4 | 8.84616e-5 |
| 5 | 0.000110577 |
| 10 | 0.000221154 |
| 20 | 0.000442308 |
| 30 | 0.000663462 |
| 40 | 0.000884616 |
| 50 | 0.0011057701 |
| 100 | 0.0022115401 |
| 500 | 0.0110577005 |
| 1000 | 0.022115401 |
Frequently asked questions
How many feddans is 1 square foot?
How do I convert square feet to feddans?
How do I convert feddans back to square feet?
How many feddans is 100 square feet?
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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 = 2.21154e-5 feddan) 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.