Convert kilometers to miles
mi = km × 0.621371. 15 km = 9.32057 mi.
mi = km × 0.621371 — 1 km is 0.621371 mi
Common values, converted exactly
| kilometers (km) | miles (mi) |
|---|---|
| 1 km | 0.621371 mi |
| 2 km | 1.24274 mi |
| 3 km | 1.86411 mi |
| 5 km | 3.10686 mi |
| 8 km | 4.97097 mi |
| 10 km | 6.21371 mi |
| 15 km | 9.32057 mi |
| 20 km | 12.4274 mi |
| 21.0975 km | 13.1094 mi |
| 25 km | 15.5343 mi |
| 42.195 km | 26.2188 mi |
| 50 km | 31.0686 mi |
| 100 km | 62.1371 mi |
Related conversions
To convert kilometers to miles, apply mi = km × 0.621371. For example, 15 km = 9.32057 mi, and 1 km is 0.621371 mi.
The mile is defined from the inch: one mile is 63,360 inches and one inch is exactly 0.0254 m, so a mile is exactly 1.609344 km. That makes the conversion exact rather than approximate — 0.621371 is a rounding of 1/1.609344.
Everything on this page is computed in your browser from the exact definitions above — the table is not a stored list of pre-rounded answers, and neither is the converter. For a unit not covered here, the full unit converter handles length, weight, volume, temperature and cooking measures.
How many miles is 15 km?
15 km = 9.32057 mi. mi = km × 0.621371, so any amount converts the same way — the table on this page lists the values most often looked up.
What is the formula for converting kilometers to miles?
mi = km × 0.621371. The mile is defined from the inch: one mile is 63,360 inches and one inch is exactly 0.0254 m, so a mile is exactly 1.609344 km. That makes the conversion exact rather than approximate — 0.621371 is a rounding of 1/1.609344.
Is the kilometers to miles conversion exact?
The underlying relationship is an exact definition, not a measurement. The decimal factor shown (0.621371 mi) is a rounding of it, so results here are given to six significant figures — enough for any practical use, and you can see the exact definition above.
How do I convert miles back to kilometers?
Use the reverse of the same relationship; the miles to km page has its own table and converter.