How to convert square feet to square kilometers
To convert square feet to square kilometers, multiply by 9.290304e-8. Area conversions are essential for real estate, flooring, land surveys, farming and map reading.
Square Foot to Square Kilometer conversion table
| Square Foot (ft²) | Square Kilometer (km²) |
|---|---|
| 0.1 ft² | 9.290304e-9 km² |
| 0.5 ft² | 4.645152e-8 km² |
| 1 ft² | 9.290304e-8 km² |
| 2 ft² | 1.8580608e-7 km² |
| 3 ft² | 2.7870912e-7 km² |
| 4 ft² | 3.7161216e-7 km² |
| 5 ft² | 4.645152e-7 km² |
| 10 ft² | 9.290304e-7 km² |
| 20 ft² | 0.0000018580608 km² |
| 25 ft² | 0.000002322576 km² |
| 50 ft² | 0.000004645152 km² |
| 100 ft² | 0.000009290304 km² |
| 500 ft² | 0.00004645152 km² |
| 1,000 ft² | 0.00009290304 km² |
About the units
Square Foot (ft²)
A square foot equals exactly 0.09290304 m² and is the standard unit for US home sizes.
Square Kilometer (km²)
A square kilometer equals 1,000,000 m² and measures cities, lakes and countries.
How to use this converter
- Type the number of square feet (ft²) in the input box.
- The result in square kilometers appears instantly — no button needed.
- See the same value in every other area unit just below.
- Use “Swap units” to convert square kilometers back to square feet.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many square kilometers are in one square foot?
One square foot equals 9.290304e-8 square kilometers. 9.290304e-8 is the exact factor used by this converter.
How do I convert square feet to square kilometers?
Multiply the value in square feet by 9.290304e-8. To go the other way, multiply square kilometers by 10,763,910.4167.
What is 10 ft² in km²?
10 ft² = 9.290304e-7 km². Also, 5 ft² = 4.645152e-7 km² and 100 ft² = 0.000009290304 km².
What is the difference between a square foot and a square kilometer?
A square foot equals exactly 0.09290304 m² and is the standard unit for US home sizes. A square kilometer equals 1,000,000 m² and measures cities, lakes and countries.
Is this tool free and private?
Yes — the Square Foot to Square Kilometer is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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