Square Kilometres to Square Miles Converter
Type a value in square kilometres to see it in square miles. It works both ways: type in the square miles box to convert back.
Formula
To convert square kilometres to square miles, divide by 2.58998811 (the same as multiplying by 0.3861021585).
1 km² = 0.386102158542 mi² and 1 mi² = 2.58998811034 km².
Square kilometres to square miles table
| Square kilometres | Square miles |
|---|---|
| 1 km² | 0.3861022 mi² |
| 2 km² | 0.7722043 mi² |
| 5 km² | 1.930511 mi² |
| 10 km² | 3.861022 mi² |
| 50 km² | 19.30511 mi² |
| 100 km² | 38.61022 mi² |
| 500 km² | 193.0511 mi² |
| 1,000 km² | 386.1022 mi² |
Worked examples
2 km² in square miles
2 km²
0.7722043 mi²
2 × 0.3861021585 = 0.7722043171
50 km² in square miles
50 km²
19.30511 mi²
50 × 0.3861021585 = 19.30510793
500 km² in square miles
500 km²
193.0511 mi²
500 × 0.3861021585 = 193.0510793
About Square Kilometres to Square Miles Converter
This converter turns square kilometres into square miles as you type, and works the other way too: type in the square miles box to convert back. To convert square kilometres to square miles, divide by 2.58998811 (the same as multiplying by 0.3861021585). For example, 2 km² is 0.7722043 mi², and 50 km² is 19.30511 mi².
Area is length squared, so the factor between two area units is the square of the factor between the matching length units. That is why a square metre is not 3.28 but about 10.76 square feet. Both units have exact definitions, so the converter gives an exact result, rounded only for display. Use the table below for common values, or set the decimal places to round the answer for a form or a label.
How to use Square Kilometres to Square Miles Converter
- Type the amount in square kilometres in the first box.
- Read the answer in square miles in the second box and in the result line below.
- To convert the other way, type in the square miles box instead, or use the swap button to open the square miles to square kilometres page.
- Choose a number of decimal places if you need a rounded figure, then copy the result line.
Common uses
- Comparing floor areas in property listings
- Ordering flooring, turf or paving
- Understanding farmland and plot sizes
- Checking room sizes on a floor plan
Frequently asked questions
How many square miles are in one square kilometre?
There are 0.3861021585 square miles in one square kilometre. This figure is exact, because both units have fixed definitions.
How do I convert square kilometres to square miles?
To convert square kilometres to square miles, divide by 2.58998811 (the same as multiplying by 0.3861021585). For example, 500 km² is 193.0511 mi².
How do I convert square miles to square kilometres?
Going the other way, multiply by 2.58998811. The square miles to square kilometres converter does this for you.
What is 50 km² in square miles?
50 km² is 19.30511 mi².
Why is the area factor so much bigger than the length factor?
Area multiplies two lengths together, so the length factor is applied twice. One metre is about 3.2808 feet, so one square metre is about 3.2808 × 3.2808 = 10.764 square feet.