Square Kilometers to Square Miles Converter
Square Kilometers to Square Miles Converter
Square kilometers to square miles is used for comparing large-scale areas — country and region sizes, national parks, wildfire coverage, and city metro areas — between countries that report land area in the metric system and the US, which typically reports in square miles.
This tool goes beyond km² and mi²: use the "From" and "To" dropdowns to convert between any combination of square millimeters, square centimeters, square meters, square kilometers, square inches, square feet, square yards, acres, hectares, and square miles.
- Conversion factor: 1 square kilometer = 0.386102 square miles (the square of the length factor: 1 km = 0.621371 mi, so 1 km² = 0.621371² mi²).
- Fully flexible: change either dropdown to convert between any two area units — not just square kilometers and square miles.
- Common use case: comparing the reported size of a country, region, or natural disaster area between metric and US news sources.
How many square miles are in a square kilometer?
1 square kilometer equals approximately 0.3861 square miles. To convert, multiply the square kilometer value by 0.3861.
Can I convert square miles back to square kilometers with this tool?
Yes — just swap the "From" and "To" selectors to Square Miles and Square Kilometers respectively; the same widget handles both directions and any other unit pair.
Square Kilometers to Square Miles Converter
Square kilometers to square miles is used for comparing large-scale areas — country and region sizes, national parks, wildfire coverage, and city metro areas — between countries that report land area in the metric system and the US, which typically reports in square miles.
This tool goes beyond km² and mi²: use the "From" and "To" dropdowns to convert between any combination of square millimeters, square centimeters, square meters, square kilometers, square inches, square feet, square yards, acres, hectares, and square miles.
- Conversion factor: 1 square kilometer = 0.386102 square miles (the square of the length factor: 1 km = 0.621371 mi, so 1 km² = 0.621371² mi²).
- Fully flexible: change either dropdown to convert between any two area units — not just square kilometers and square miles.
- Common use case: comparing the reported size of a country, region, or natural disaster area between metric and US news sources.
How many square miles are in a square kilometer?
1 square kilometer equals approximately 0.3861 square miles. To convert, multiply the square kilometer value by 0.3861.
Can I convert square miles back to square kilometers with this tool?
Yes — just swap the "From" and "To" selectors to Square Miles and Square Kilometers respectively; the same widget handles both directions and any other unit pair.