Square Miles ↔ Square Kilometers
Convert between sq mi and sq km
Square Miles ↔ Square Kilometers
Quick Facts
- •1 sq mi = 2.59 sq km
- •1 sq km = 0.386 sq mi
Square Miles and Square Kilometers
One square mile equals 2.59 square kilometers. This conversion is used for comparing geographic areas, national parks, cities, and countries. For reference, Manhattan is about 23 square miles (59.1 sq km).
How to convert Square Miles to Square Kilometers
To convert square miles to square kilometers, multiply the number of square miles by the conversion factor. The exact factor is 2.58999.
Formula
Square Kilometers = Square Miles × 2.58999
Worked example
Convert 10 Square Miles to Square Kilometers: 10 Square Miles = 25.8999 Square Kilometers.
Square Miles to Square Kilometers reference table
Use this quick lookup for common square miles to square kilometers values.
| Square Miles (Square Miles) | Square Kilometers (Square Kilometers) |
|---|---|
| 1 Square Miles | 2.59 Square Kilometers |
| 2 Square Miles | 5.18 Square Kilometers |
| 5 Square Miles | 12.9499 Square Kilometers |
| 10 Square Miles | 25.8999 Square Kilometers |
| 20 Square Miles | 51.7998 Square Kilometers |
| 25 Square Miles | 64.7497 Square Kilometers |
| 50 Square Miles | 129.4995 Square Kilometers |
| 75 Square Miles | 194.2492 Square Kilometers |
| 100 Square Miles | 258.999 Square Kilometers |
| 250 Square Miles | 647.4975 Square Kilometers |
Frequently asked questions
What is the formula to convert Square Miles to Square Kilometers?
Multiply the number of square miles by 2.58999 to get square kilometers. For example, 10 Square Miles equals 25.8999 Square Kilometers.
How many square kilometers are in 1 square mile?
1 Square Miles equals 2.59 Square Kilometers.
How do I convert square kilometers back to square miles?
Reverse the formula: Square Miles = Square Kilometers ÷ 2.58999. For example, 100 Square Kilometers equals 38.6102 Square Miles.
Is this Square Miles to Square Kilometers converter accurate?
Yes. Conversions use the internationally accepted ratio for square miles and square kilometers and are calculated to 4 decimal places in your browser.
What is 10 Square Miles in Square Kilometers?
10 Square Miles equals 25.8999 Square Kilometers.
More Area Tools
This calculator is for educational and reference purposes only. Always verify critical calculations independently.