KM to Miles Converter
Convert kilometers to miles in one step. Enter a distance in km and get the value in miles, with the formula, examples and common distances below.
Miles = Kilometers × 0.6213711922
KM to Miles Formula
To convert kilometers to miles, multiply the number of kilometers by 0.6213711922. This comes from the exact definition of the international mile: 1 mile = 1.609344 km. The converter divides by that exact value, so results match the formula to the displayed precision. To convert miles to kilometers, multiply by 1.609344.
How to Convert Kilometers to Miles
- Enter the distance in kilometers. Decimals such as 42.195 are fine, and negative values are accepted for signed distances such as route offsets.
- The answer in miles appears instantly, or press Convert Now.
- Use Swap Units to convert miles to kilometers, Copy Result to copy the answer, or Clear to start again.
By hand: multiply kilometers by 0.6214. A handy shortcut is to take 60% of the distance and add a little. For 100 km that gives about 60 + 2 = 62 miles, against the exact 62.137119 miles.
The same factor converts speed: 100 km/h is about 62.137119 mph.
Practical Examples
- 5K run: 5 km × 0.6213711922 = 3.106856 miles.
- 10K run: 10 km = 6.213712 miles.
- Marathon: 42.195 km = 26.218757 miles, which is about 26 miles 385 yards.
- Road trip: 350 km = 217.479917 miles.
- Speed limit: 120 km/h = 74.564543 mph.
KM to Miles – Common Values
Quick reference for frequently used conversions
| Kilometers (km) | Miles (mi) | Meters (m) |
|---|---|---|
| 1 km | 0.621371 mi | 1,000 m |
| 2 km | 1.242742 mi | 2,000 m |
| 3 km | 1.864114 mi | 3,000 m |
| 5 km | 3.106856 mi | 5,000 m |
| 10 km | 6.213712 mi | 10,000 m |
| 21.0975 km | 13.109379 mi | 21,098 m |
| 25 km | 15.53428 mi | 25,000 m |
| 42.195 km | 26.218757 mi | 42,195 m |
| 50 km | 31.06856 mi | 50,000 m |
| 80 km | 49.709695 mi | 80,000 m |
| 100 km | 62.137119 mi | 100,000 m |
| 200 km | 124.274238 mi | 200,000 m |
| 500 km | 310.685596 mi | 500,000 m |
| 1000 km | 621.371192 mi | 1,000,000 m |
Where and Why This Conversion Is Used
Kilometers are the road and travel distance unit in most of the world, while the United States and the United Kingdom use miles on road signs and in everyday speech. Travellers, drivers and runners switch between them often.
- Driving and travel: distances and speed limits on road signs, maps and rental-car odometers can be in either unit.
- Running and cycling: race distances such as 5K, 10K and the marathon are commonly compared in miles for US events.
- Fuel economy: comparing km per litre, litres per 100 km and miles per gallon starts with converting distance.
- Shipping and logistics: route distances and delivery zones may be quoted in kilometers or miles.
- Geography and education: distances between cities and countries are often listed in both units.
Note that a nautical mile (1.852 km) is a different unit from the statute mile used here. For other conversions see the Meters to Feet Converter.