Kilometers belong to the metric system, while miles belong to the imperial system. To convert a value from kilometers to miles, multiply the number of kilometers by 0.621371.
| Kilometers | Miles |
|---|
Formula: mi = km × 0.621371
Example: Convert 5 km to miles.
5 km × 0.621371 = 3.107 mi
So, 5 kilometers is equal to approximately 3.11 miles.
What is a Kilometer?
A kilometer (km) is a unit of length in the metric system, equal to 1,000 meters. It is the standard unit used almost everywhere in the world to measure distances between cities, road lengths, and travel distances.
What is a Mile?
A mile (mi) is a unit of length in the imperial and US customary systems of measurement. It is defined as exactly 1,609.344 meters, or 5,280 feet. Miles are mainly used for measuring distances in the United States and the United Kingdom, especially on road signs.
Kilometer to Mile Relationship
1 km = 0.621371 mi
1 mi = 1.609344 km
This exact conversion factor comes from the internationally agreed definitions of the mile and meter, established by treaty in 1959.
Km to Mi Conversion Table
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 km | 0.621 mi |
| 2 km | 1.243 mi |
| 5 km | 3.107 mi |
| 10 km | 6.214 mi |
| 20 km | 12.427 mi |
| 50 km | 31.069 mi |
| 100 km | 62.137 mi |
| 500 km | 310.686 mi |
| 1000 km | 621.371 mi |
Solved Examples
Example 1: Convert 3 km to miles.
3 × 0.621371 = 1.864 mi
Example 2: Convert 15 km to miles.
15 × 0.621371 = 9.321 mi
Example 3: Which is greater, 10 miles or 6 km?
6 km = 3.728 mi, so 10 miles is greater than 6 km.
Frequently Asked Questions
There are approximately 0.621 miles in 1 kilometer.
Multiply the km value by 0.621371 to get the equivalent distance in miles.
Yes, a kilometer is shorter than a mile 1 kilometer equals about 0.621 miles.
Kilometers are used almost worldwide for road distances and speed limits, except in the United States and the United Kingdom, where miles are still standard.