How to convert square feet to square kilometers
km² = ft² × 9.290304×10⁻⁸Multiply the value in square feet by 9.290304×10⁻⁸. To go the other way, multiply by 10,763,910.42 (or divide by 9.290304×10⁻⁸).
A square foot is smaller than a square kilometer: it takes 10,763,910.42 square feet to make one square kilometer.
Worked examples
- 1 square foot1 ft² × 9.290304×10⁻⁸ = 9.290304×10⁻⁸ km²
- 5 square feet5 ft² × 9.290304×10⁻⁸ = 4.645152×10⁻⁷ km²
- 10 square feet10 ft² × 9.290304×10⁻⁸ = 9.290304×10⁻⁷ km²
- 20 square feet20 ft² × 9.290304×10⁻⁸ = 0.0000018580608 km²
- 100 square feet100 ft² × 9.290304×10⁻⁸ = 0.000009290304 km²
Square feet to square kilometers conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Square feet (ft²) | Square kilometers (km²) |
|---|---|
| 0.1 ft² | 9.290304×10⁻⁹ km² |
| 0.25 ft² | 2.322576×10⁻⁸ km² |
| 0.5 ft² | 4.645152×10⁻⁸ km² |
| 1 ft² | 9.290304×10⁻⁸ km² |
| 2 ft² | 1.8580608×10⁻⁷ km² |
| 3 ft² | 2.7870912×10⁻⁷ km² |
| 4 ft² | 3.7161216×10⁻⁷ km² |
| 5 ft² | 4.645152×10⁻⁷ km² |
| 6 ft² | 5.5741824×10⁻⁷ km² |
| 7 ft² | 6.5032128×10⁻⁷ km² |
| 8 ft² | 7.4322432×10⁻⁷ km² |
| 9 ft² | 8.3612736×10⁻⁷ km² |
| 10 ft² | 9.290304×10⁻⁷ km² |
| Square feet (ft²) | Square kilometers (km²) |
|---|---|
| 12 ft² | 0.0000011148365 km² |
| 15 ft² | 0.0000013935456 km² |
| 20 ft² | 0.0000018580608 km² |
| 25 ft² | 0.000002322576 km² |
| 30 ft² | 0.0000027870912 km² |
| 40 ft² | 0.0000037161216 km² |
| 50 ft² | 0.000004645152 km² |
| 75 ft² | 0.000006967728 km² |
| 100 ft² | 0.000009290304 km² |
| 250 ft² | 0.00002322576 km² |
| 500 ft² | 0.00004645152 km² |
| 1,000 ft² | 0.00009290304 km² |
About the units
Square foot (ft²)
A square one foot on each side, exactly 0.09290304 m². The standard unit for US home, rental and flooring areas.
Square kilometer (km²)
One million square metres or 100 hectares; used for city, lake and country areas. One square kilometer equals 1,000,000 square meters (m²).
Frequently asked questions
How many square kilometers are in one square foot?
There are 9.290304×10⁻⁸ square kilometers in one square foot, and this value is exact by definition.
How do I convert square feet to square kilometers?
Multiply the number of square feet by 9.290304×10⁻⁸. For example, 10 ft² × 9.290304×10⁻⁸ = 9.290304×10⁻⁷ km².
How many square feet are in one square kilometer?
One square kilometer equals 10,763,910.42 square feet. That is the reverse factor, 1 ÷ 9.290304×10⁻⁸.
What is 10 square feet in square kilometers?
10 ft² = 9.290304×10⁻⁷ km².
Is this ft² to km² converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.