Square inches (in²) to Square kilometers (km²) Conversion
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Square inches
The square inch is a unit of area equal to exactly 6.4516 cm² (the square of 2.54 cm). It is used in engineering for specifying material cross-sections, pressure calculations (pounds per square inch = psi), and the dimensions of small components. Tile and flooring materials in the United States are sometimes measured in square inches for small-format tiles.
Square kilometers
The square kilometre is a unit of area equal to one million square metres (10⁶ m²) and is the standard unit for expressing the surface areas of countries, cities, lakes, forests, and other large geographic features. Russia, the world's largest country, covers approximately 17.1 million km². The surface area of Earth is approximately 510.1 million km², of which about 70.8% is ocean.
| Square inches (in²) | Square kilometers (km²) |
|---|---|
| 0.1 in² | 6.4516E-11 km² |
| 1 in² | 6.4516E-10 km² |
| 2 in² | 1.29032E-9 km² |
| 3 in² | 1.93548E-9 km² |
| 5 in² | 3.2258E-9 km² |
| 10 in² | 6.4516E-9 km² |
| 20 in² | 1.29032E-8 km² |
| 30 in² | 1.93548E-8 km² |
| 50 in² | 3.2258E-8 km² |
| 100 in² | 6.4516E-8 km² |
| 1000 in² | 6.4516E-7 km² |
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