Convert square inches to square kilometers
Enter a square inches value below and convert to square kilometers
in²
1 square inch ≈
0.000000000645 square kilometers
* rounded result
Select how many decimal places the result will be rounded to:
How to convert square inches to square kilometers
To convert square inches to square kilometers, multiply a square inches value by 0.00000000064516.
Formula km² = in² × 0.00000000064516
Example: Convert 1000000 square inches to square kilometers Calculations: 1000000 in² × 0.00000000064516 ≈ 0.000645 km²
Square inch (in²)
The square inch is the imperial system's unit of area, defined as the area of a square with sides of 1 inch. It is equal to about 0.000645 square meters.
Square kilometer (km²)
The square kilometer is a unit of area in the metric system, defined as the area of a square with sides of 1 kilometer. It is equal to about 0.3861 square miles.