Square kilometres to square miles
Multiply square kilometres by 0.386102 to get square miles.
25 km² = 9.6526 mi²
How to convert square kilometres to square miles
The square mile is exactly 2 589 988.110336 m² (1609.344 m squared). The square kilometre is one million square metres (10⁶ m²).
Worked example — 25 km²: 25 × 0.386102 = 9.6526 mi².
Square kilometres to square miles table
| Square kilometres | Square miles |
|---|---|
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 5 km² | 1.9305 mi² |
| 10 km² | 3.861 mi² |
| 25 km² | 9.6526 mi² |
| 50 km² | 19.3051 mi² |
| 100 km² | 38.6102 mi² |
| 500 km² | 193.0511 mi² |
| 1,000 km² | 386.1022 mi² |
Reverse and related
About square kilometres and square miles
Square kilometre (km²)
1 km² = 0.386102 mi²Definition. One million square metres (10⁶ m²)
History and origin
The square kilometre is a square one kilometre on each side, one million square metres. It became the metric unit for large land areas.
Current use
Square kilometres measure land area and the size of cities and regions.
Source: BIPM SI Brochure (2019)
Square mile (mi²)
1 mi² = 2.59 km²Definition. Exactly 2 589 988.110336 m² (1609.344 m squared)
History and origin
The square mile is a square one mile on each side, built from the statute mile. It equals about 2.59 square kilometres, or 640 acres.
Current use
Square miles measure land, counties and regions in the United States and United Kingdom.
Source: NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement
Where people use this
Square kilometres: land area, city and region sizes. Square miles: land and county area. 1 km² is about 0.386 sq mi.
Every value is carried to full double precision; the display is rounded.
Sources: NIST Handbook 44, Appendix C (area); 1959 yard-and-pound agreement; BIPM SI Brochure (2019).
Questions people ask
How many sq mi in a km²?
One square kilometre is about 0.386 square miles.
How many sq mi is 10 km²?
10 km² is about 3.86 sq mi.
How many km² is a square mile?
One square mile is about 2.59 km².