1 square kilometer = 0.3861021585 square miles
All conversions
| Unit | Symbol | Value |
|---|
Quick answer
To convert square kilometers to square miles, multiply the number of square kilometers by 0.386102. For example, 2.59 square kilometers = 1 square miles.
How to Convert Square KM to Square Miles
The formula is square miles = square kilometers × 0.3861021585. 1 square kilometer = 0.3861021585 square miles. Type any value in the converter above for an instant answer, or use the chart below for the most common values.
This page is preset for square kilometer to square mile conversions, but you can switch either list to any of the 39 units in the Area Converter, or go the other way with the Square Miles to Square KM converter.
Square KM to Square Miles conversion chart
| Square KM | Square Miles |
|---|---|
| 0.1 km² | 0.038610216 mi² |
| 0.25 km² | 0.09652554 mi² |
| 0.5 km² | 0.19305108 mi² |
| 1 km² | 0.38610216 mi² |
| 2 km² | 0.77220432 mi² |
| 2.59 km² | 1.0000046 mi² |
| 3 km² | 1.1583065 mi² |
| 4 km² | 1.5444086 mi² |
| 5 km² | 1.9305108 mi² |
| 6 km² | 2.316613 mi² |
| 7 km² | 2.7027151 mi² |
| 8 km² | 3.0888173 mi² |
| 9 km² | 3.4749194 mi² |
| 10 km² | 3.8610216 mi² |
| 11 km² | 4.2471237 mi² |
| 12 km² | 4.6332259 mi² |
| 13 km² | 5.0193281 mi² |
| 14 km² | 5.4054302 mi² |
| 15 km² | 5.7915324 mi² |
| 16 km² | 6.1776345 mi² |
| 17 km² | 6.5637367 mi² |
| 18 km² | 6.9498389 mi² |
| 19 km² | 7.335941 mi² |
| 20 km² | 7.7220432 mi² |
| 25 km² | 9.652554 mi² |
| 30 km² | 11.583065 mi² |
| 40 km² | 15.444086 mi² |
| 50 km² | 19.305108 mi² |
| 60 km² | 23.16613 mi² |
| 70 km² | 27.027151 mi² |
| 75 km² | 28.957662 mi² |
| 80 km² | 30.888173 mi² |
| 90 km² | 34.749194 mi² |
| 100 km² | 38.610216 mi² |
| 150 km² | 57.915324 mi² |
| 200 km² | 77.220432 mi² |
| 250 km² | 96.52554 mi² |
| 500 km² | 193.05108 mi² |
| 1,000 km² | 386.10216 mi² |
Common Square KM to Square Miles conversions
- 1 square kilometer = 0.3861021585 square miles
- 1 km² = 0.38610216 mi²
- 2.59 km² = 1.0000046 mi²
- 10 km² = 3.8610216 mi²
- 100 km² = 38.610216 mi²
- 1,000 km² = 386.10216 mi²
Popular area converters
How to Use the Square KM to Square Miles Converter
- Type a value in the From box and choose its unit.
- Pick the unit you want in the To list — the result updates as you type.
- Use the swap button to reverse the conversion, or type in the To box to convert backwards.
- Check the All conversions table to see your value in every unit; click a row to make it the target.
Frequently Asked Questions
How many square miles are in a square kilometer?
There are 0.3861021585 square miles in 1 square kilometer. Going the other way, 1 square mile = 2.58998811 square kilometers.
How do I convert Square KM to Square Miles?
Use the formula square miles = square kilometers × 0.3861021585. For example, 1 square kilometer = 0.3861021585 square miles. Or type the value in the converter above and the answer appears as you type.
What is the Square KM to Square Miles formula?
square miles = square kilometers × 0.3861021585 — the factor is rounded to 10 significant figures, which is far more precise than everyday use needs.
What is 1 square kilometer in square miles?
1 square kilometer = 0.38610216 square miles.
What is 2.59 square kilometers in square miles?
2.59 square kilometers = 1.0000046 square miles.
What is 10 square kilometers in square miles?
10 square kilometers = 3.8610216 square miles.
What is 100 square kilometers in square miles?
100 square kilometers = 38.610216 square miles.
What is 1,000 square kilometers in square miles?
1,000 square kilometers = 386.10216 square miles.
How do I convert Square Miles back to Square KM?
Use the swap button in the converter above, or open our Square Miles to Square KM converter. square kilometers = square miles × 2.58998811.
Is this Square KM to Square Miles converter accurate?
Yes. It uses exact unit definitions and double-precision maths, and you can show up to 15 significant digits. The table below is calculated with the same formula.
Can I convert Square KM to other area units?
Yes — pick any unit in the From and To lists above, or open the full Area Converter, which handles 39 area units.
Is the Square KM to Square Miles converter free?
Yes, it is free with no sign-up, and every conversion runs in your browser so nothing is sent to a server.