Square Feet to Square Kilometers Converter
Convert square feet (sq ft) to square kilometers (km²), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter an area, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 sq ft = 9.290304e-8 km²
- 1 × 9.290304e-8 = 9.290304e-8 km²
How to convert square feet to square kilometers
1 sq ft = 9.290304 × 10⁻⁸ km², so multiply by 9.290304 to go from square feet to square kilometers. Going the other way, 1 km² = 10,763,910.4167 sq ft.
km² = sq ft × 9.290304 sq ft = km² × 10,763,910.4167
Worked example:
1 sq ft = 9.290304e-8 km² 5 × 9.290304e-8 = 4.645152e-7 km²
Square Feet to square kilometers table
| Square Feet | Square Kilometers |
|---|---|
| 1 sq ft | 9.290304 × 10⁻⁸ km² |
| 2 sq ft | 1.8580608 × 10⁻⁷ km² |
| 3 sq ft | 2.7870912 × 10⁻⁷ km² |
| 4 sq ft | 3.7161216 × 10⁻⁷ km² |
| 5 sq ft | 4.645152 × 10⁻⁷ km² |
| 6 sq ft | 5.5741824 × 10⁻⁷ km² |
| 7 sq ft | 6.5032128 × 10⁻⁷ km² |
| 8 sq ft | 7.4322432 × 10⁻⁷ km² |
| 9 sq ft | 8.3612736 × 10⁻⁷ km² |
| 10 sq ft | 9.290304 × 10⁻⁷ km² |
| 15 sq ft | 1.3935456 × 10⁻⁶ km² |
| 20 sq ft | 1.8580608 × 10⁻⁶ km² |
| 25 sq ft | 2.322576 × 10⁻⁶ km² |
| 30 sq ft | 2.7870912 × 10⁻⁶ km² |
| 40 sq ft | 3.7161216 × 10⁻⁶ km² |
| 50 sq ft | 4.645152 × 10⁻⁶ km² |
| 75 sq ft | 6.967728 × 10⁻⁶ km² |
| 100 sq ft | 9.290304 × 10⁻⁶ km² |
| 250 sq ft | 2.322576 × 10⁻⁵ km² |
| 500 sq ft | 4.645152 × 10⁻⁵ km² |
| 1000 sq ft | 9.290304 × 10⁻⁵ km² |
About the units
- Square Feet (sq ft)
- Square feet, a US customary unit. Definition: NIST Handbook 44 Appendix C (derived from the international foot).
- Square Kilometers (km²)
- Square kilometers, a metric unit. Definition: BIPM SI Brochure (SI prefixes).