Convert Feddan to Square Inch
Convert feddans to square inches instantly. 1 feddan = 6511299.5225990452 square inch — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Inch to Feddan converter for the reverse conversion.
Units explained
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 Inch
A square inch is an imperial unit of area equal to exactly 0.00064516 m², the area of a square with sides of one inch. It is widely used in the United States for small-area measurements.
Derived by squaring the inch. The inch was standardized to exactly 25.4 mm via the 1959 International Yard and Pound Agreement.
Square inches are used extensively in US engineering, manufacturing, real estate (for floor plans), and everyday small-area measurements. Engine displacement is often expressed in cubic inches but cross-sections in square inches.
Inch dates to medieval English usage; modern exact value standardized in 1959.
Feddan to Square Inch conversion formula
The relationship between feddans and square inches:
To convert feddans to square inches, multiply the value in feddans by 6511299.5225990452. To reverse, multiply square inches by 1.535792e-7.
How to use this converter
Type a value into the calculator. The result in square inches 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 Inch to Feddan converter for the reverse direction.
Step-by-step: convert feddans to square inches
- Write down the value in feddans (feddan).
- Multiply that value by the factor 6511299.5225990452.
- The product is the equivalent value in square inches (in²).
- To reverse, multiply the square inch value by 1.535792e-7.
Worked examples
Example 1 — Convert 1 feddan to in²:
1 × 6511299.5225990452 = 6511299.5225990452 in²
Example 2 — Convert 100 feddan to in²:
100 × 6511299.5225990452 = 6.5113e+8 in²
Real-world example — Long-haul to feature-scale
One feddan equals one billion square inches — useful in fiber-optic engineering, where total cable length is given in the larger unit but feature-level attenuation depends on micro-scale variations.
1 feddan × 6511299.5225990452 = 6511299.5225990452 in²
Real-world example — Geographic to fiber-optic scale
One feddan equals one billion square inches. This conversion appears in fiber-optic specifications, where total link length is given in feddans but signal attenuation depends on micro-scale variations along the fiber.
1 feddan × 6511299.5225990452 = 6511299.5225990452 in²
Feddan to Square Inch conversion table
Standard reference values for converting feddans to square inches:
| Feddan [feddan] | Square Inch [in²] |
|---|---|
| 0.01 | 65112.9952259905 |
| 0.1 | 651129.9522599046 |
| 1 | 6511299.5225990452 |
| 2 | 1.30226e+7 |
| 3 | 1.95339e+7 |
| 4 | 2.60452e+7 |
| 5 | 3.25565e+7 |
| 10 | 6.5113e+7 |
| 20 | 1.30226e+8 |
| 30 | 1.95339e+8 |
| 40 | 2.60452e+8 |
| 50 | 3.25565e+8 |
| 100 | 6.5113e+8 |
| 500 | 3.25565e+9 |
| 1000 | 6.5113e+9 |
Frequently asked questions
How many square inches is 1 feddan?
How do I convert feddans to square inches?
How do I convert square inches back to feddans?
How many square inches is 100 feddans?
Popular area unit conversions
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Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 feddan = 6511299.5225990452 in²) 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.