About the km² to ft² calculation
One square kilometer is exactly 10,763,910.42 square feet, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The usual scale for reporting the area of cities and regions. How property floor area is quoted in the US, UK and India.
Formula
ft² = km² × 10,763,910.42
1 km² = 10,763,910.42 ft²
1 ft² = 9.2903e-8 km²Worked example
To convert 1 km², multiply by 10,763,910.42: 1 × 10,763,910.42 = 10,763,910.42 ft².
Frequently asked questions
How many square feet are in a square kilometer?
There are 10,763,910.42 square feet in one square kilometer. To convert any amount, multiply the number of square kilometers by 10,763,910.42.
How do I convert square feet back to square kilometers?
Divide instead of multiplying, or equivalently multiply by 9.2903e-8. One square foot is 9.2903e-8 square kilometers.
Is this conversion exact?
Yes. Since the international agreement of 1959, the relationship between square kilometers and square feet is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.
Where is each of these units used?
Square Kilometers: the usual scale for reporting the area of cities and regions. Square Feet: how property floor area is quoted in the US, UK and India.
Sources
- NIST Special Publication 811 — Guide for the Use of the International System of Units