Square Kilometers to Square Miles converter (km² to mi²)
Convert Square Kilometers (km²) to Square Miles (mi²) with this free calculator. Type a value, press Convert, and the page applies the same factor shown in the formula below — no rounded shortcut, and nothing is stored on a server.
Square Miles to Square Kilometers (mi² to km²) ►
How to convert Square Kilometers to Square Miles
1 square kilometer (km²) is equal to 0.386102 square miles (mi²).
mi² = km² × 0.386102
Multiply the square kilometers by 0.386102:
Example: Convert 10 km² to mi²:
mi² = 10 × 0.386102 = 3.86102 mi²
What is a Square Kilometers?
The Square Kilometers (km²) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
What is a Square Miles?
The Square Miles (mi²) is the starting or target unit on this page. Use the calculator above to convert values without looking up the factor by hand.
This page converts area from Square Kilometers into Square Miles. One km² equals 0.386102 mi².
Square Kilometers to Square Miles conversion table
Common km² values and the matching mi² result, calculated with the same factor as the widget. Highlight a nearby row if you want a quick check without entering a number.
| Square Kilometers (km²) | Square Miles (mi²) |
|---|---|
| 1 km² | 0.386102 mi² |
| 5 km² | 1.93051 mi² |
| 10 km² | 3.86102 mi² |
| 50 km² | 19.3051 mi² |
| 100 km² | 38.6102 mi² |
| 500 km² | 193.051 mi² |
| 1000 km² | 386.102 mi² |
How this calculator works
The form on this page is a Square Kilometers-to-Square Miles converter. After you enter a number, JavaScript multiplies or rearranges it with the published conversion factor and writes the mi² result in the output box. The step-by-step panel repeats the arithmetic so you can copy it into homework or a spreadsheet.
Reviewed by Hamsen, founder of GigaTables and a biology engineer. See the about page for how formulas are checked before a tool is published.
FAQ
How many mi² are in 1 km²?
1 km² = 0.386102 mi².
How do I convert Square Kilometers to Square Miles?
Multiply the square kilometers by 0.386102:
Is this km² to mi² converter free?
Yes. GigaTables calculators are free to use in a browser. You do not need an account, and the values you type are not uploaded.