Square Kilometers to Square Miles
Convert km² to mi² quickly with this free online calculator. The page explains the conversion rule, gives practical examples and provides a quick reference table.
1 square kilometer equals about 0.386102 square miles.
How to use the Square Kilometers to Square Miles
- Enter the number you want to convert.
- Confirm the source unit shown beside the input.
- Choose decimal precision if you need more or less detail.
- Read the converted result.
- Copy the result when you need to use it elsewhere.
How the conversion works
1 square kilometer equals about 0.386102 square miles.
For a simple fixed-factor conversion, the calculator multiplies the entered value by the stated factor. Temperature scales and certain specialized tools use their specific mathematical relationship instead.
Common km² to mi² conversions
| km² | mi² |
|---|---|
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 5 km² | 1.930511 mi² |
| 10 km² | 3.861022 mi² |
| 20 km² | 7.722043 mi² |
| 50 km² | 19.305108 mi² |
Example
For example, entering 1 km² gives approximately 0.386102 mi² using the rule above. Change the input to test your own value.
Frequently asked questions
Accuracy note: This calculator is a practical reference. For regulated, safety-critical or specialized work, verify the result against the applicable standard.
Page reviewed: August 24, 2026.