Square inches to Square kilometres
Convert square inches to square kilometres (in² to km²). 1 in² = 6.4516E-10 km². Use the calculator, formula and conversion table.
How to convert square inches to square kilometres
Multiply the amount in square inches by 6.4516E-10 to get square kilometres. The displayed factor and results are rounded to 12 significant digits.
km² = in² × 6.4516E-10Worked example
1 in² = 6.4516E-10 km². Change the amount in the calculator above to use your own value.
Units and assumptions
Area uses squared length factors: one square foot is exactly 0.09290304 square metres. Acres are international acres; hectares equal 10,000 square metres.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Square inches to Square kilometres table
| Square inches (in²) | Square kilometres (km²) |
|---|---|
| 0 | 0 |
| 1 | 6.4516E-10 |
| 5 | 3.2258E-9 |
| 10 | 6.4516E-9 |
| 25 | 1.6129E-8 |
| 100 | 6.4516E-8 |
| 1,000 | 6.4516E-7 |
About this conversion
What is the formula for square inches to square kilometres?
km² = in² × 6.4516E-10. Multiply the amount in square inches by 6.4516E-10 to get square kilometres. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to square inches?
Use the square kilometres to square inches calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the area converter to browse all supported pairs.