Miles to Kilometres Conversion: Formula and Quick Reference
Convert miles to km and km to miles. Formula, chart, and when each measurement is used around the world.
Miles vs Kilometres
The kilometre (km) is the metric unit of distance used by 195 of the world's 197 countries. The mile is used primarily in the United States, United Kingdom (road signs), and a few other countries.
India uses kilometres for all road distances, speed limits, and navigation.
Conversion Formula
1 mile = 1.60934 kilometres (exact)
1 kilometre = 0.62137 miles (exact)
Quick approximation: multiply miles by 1.6 to get km. Multiply km by 0.6 to get miles.
Common Distance Conversions
| Miles | Kilometres |
|---|---|
| 1 mile | 1.61 km |
| 5 miles | 8.05 km |
| 10 miles | 16.09 km |
| 26.2 miles (marathon) | 42.19 km |
| 100 miles | 160.9 km |
| 1 km | 0.621 miles |
| 5 km | 3.107 miles |
| 10 km | 6.214 miles |
| 42.195 km (marathon) | 26.2 miles |
Running and Fitness Reference
Runners training for races need to convert between miles and km. A 5K race is 3.107 miles. A 10K is 6.214 miles. A half-marathon (21.0975 km) is 13.1 miles.
Many fitness apps (Strava, Nike Run Club) allow switching between km and miles in settings.
Speed Conversion: mph vs kph
If you know your speed in mph and want km/h:
60 mph = 96.56 kph (highway speed in the US is commonly 60-70 mph = 96-113 kph)
Indian speed limits: 50 km/h urban, 80-100 km/h state highways, 120 km/h expressways.
Frequently asked questions
How many km is 1 mile?
1 mile = 1.60934 kilometres. Quick approximation: multiply miles by 1.6.
How many miles is 5 km?
5 km = 3.107 miles. A 5K run is approximately 3.1 miles.