Square miles → Square kilometers converter (mi² to km²) - Area Converter

Table Of Contents

Square miles to square kilometers Conversion
Formula
Examples
- Convert 10 square miles to square kilometers:
Conversion table

Square miles to square kilometers Conversion

1 square miles (mi²) is equal to 2.58998811 square kilometers (km²).

1 mi² = 2.58998811 km²

1 km² = 0.3861021585 mi²

Formula

To convert a area from square miles (mi²) to square kilometers (km²), multiply the area in square miles by 2.58998811

a_(km²) = a_(mi²) × 2.58998811

Examples:

Convert 10 square miles to square kilometers:

a_(km²) = 10mi² × 2.58998811 = 25.8998811 km²

Conversion table

Square miles (mi²)	Square kilometers (km²)
1 mi²	2.58998811 km²
2 mi²	5.179976221 km²
3 mi²	7.769964331 km²
5 mi²	12.949940552 km²
10 mi²	25.899881103 km²
20 mi²	51.799762207 km²
25 mi²	64.749702758 km²
50 mi²	129.499405517 km²
100 mi²	258.998811034 km²
250 mi²	647.497027584 km²
500 mi²	1294.994055168 km²
1000 mi²	2589.988110336 km²

Square miles (mi²)

Square kilometers (km²)

1 mi²

2.58998811 km²

2 mi²

5.179976221 km²

3 mi²

7.769964331 km²

5 mi²

12.949940552 km²

10 mi²

25.899881103 km²

20 mi²

51.799762207 km²

25 mi²

64.749702758 km²

50 mi²

129.499405517 km²

100 mi²

258.998811034 km²

250 mi²

647.497027584 km²

500 mi²

1294.994055168 km²

1000 mi²

2589.988110336 km²

Square kilometers (km²)	Square miles (mi²)
1 km²	0.386102159 mi²
2 km²	0.772204317 mi²
3 km²	1.158306476 mi²
5 km²	1.930510793 mi²
10 km²	3.861021585 mi²
20 km²	7.722043171 mi²
25 km²	9.652553964 mi²
50 km²	19.305107927 mi²
100 km²	38.610215854 mi²
250 km²	96.525539636 mi²
500 km²	193.051079271 mi²
1000 km²	386.102158542 mi²

Square kilometers (km²)

Square miles (mi²)

1 km²

0.386102159 mi²

2 km²

0.772204317 mi²

3 km²

1.158306476 mi²

5 km²

1.930510793 mi²

10 km²

3.861021585 mi²

20 km²

7.722043171 mi²

25 km²

9.652553964 mi²

50 km²

19.305107927 mi²

100 km²

38.610215854 mi²

250 km²

96.525539636 mi²

500 km²

193.051079271 mi²

1000 km²

386.102158542 mi²

Frequently asked questions

How do I convert square miles to square kilometers?

Multiply the value in square miles by 2.58998811 to get the result in square kilometers. For example, 5 mi² × 2.58998811 = 12.949940552 km².

How many square kilometers are in 1 square miles?

1 square miles (mi²) is equal to 2.58998811 square kilometers (km²).

How do I convert square kilometers back to square miles?

Use the inverse operation: divide the value in square kilometers by 2.58998811 to get the result in square miles.

How accurate is the square miles to square kilometers conversion?

The converter multiplies by the conversion factor 2.58998811 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.