The kilometer
The kilometer (km) equals exactly 1,000 meters. It is the standard unit for road distances in almost every country except the United States and the United Kingdom. A 5K running race is 5 kilometers; a marathon is 42.195 km.
500 Kilometers to Miles
500 km = 310.686 mi
500 kilometers (km) equals 310.686 miles (mi). The conversion uses the exact factor 0.621371: 500 × 0.621371 = 310.686.
Formula
Miles = Kilometers × 0.621371Quick
How to convert kilometers to miles
Take your value
Start with your value in kilometers.
Multiply by 0.621371
Multiply the kilometer value by 0.621371. This is the exact conversion factor from kilometers to miles.
Read the result
The product is your value in miles. For example, 5 km × 0.621371 = 3.10686 mi.
Conversion formula
The exact factor from kilometers to miles is 0.621371.
Miles = Kilometers × 0.621371
Kilometers to Miles conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Kilometers (km) | Miles (mi) |
|---|---|
| 0.1 km | 0.062137 mi |
| 0.25 km | 0.15534 mi |
| 0.5 km | 0.31069 mi |
| 1 km | 0.62137 mi |
| 2 km | 1.2427 mi |
| 3 km | 1.8641 mi |
| 4 km | 2.4855 mi |
| 5 km | 3.1069 mi |
| 6 km | 3.7282 mi |
| 7 km | 4.3496 mi |
| 8 km | 4.971 mi |
| 9 km | 5.5923 mi |
| 10 km | 6.2137 mi |
| 11 km | 6.8351 mi |
| 12 km | 7.4565 mi |
| 13 km | 8.0778 mi |
| 14 km | 8.6992 mi |
| 15 km | 9.3206 mi |
| 16 km | 9.9419 mi |
| 18 km | 11.185 mi |
| 20 km | 12.427 mi |
| 22 km | 13.67 mi |
| 24 km | 14.913 mi |
| 25 km | 15.534 mi |
| 28 km | 17.398 mi |
| 30 km | 18.641 mi |
| 32 km | 19.884 mi |
| 36 km | 22.369 mi |
| 40 km | 24.855 mi |
| 45 km | 27.962 mi |
| 48 km | 29.826 mi |
| 50 km | 31.069 mi |
| 60 km | 37.282 mi |
| 70 km | 43.496 mi |
| 75 km | 46.603 mi |
| 80 km | 49.71 mi |
| 90 km | 55.923 mi |
| 100 km | 62.137 mi |
| 125 km | 77.671 mi |
| 150 km | 93.206 mi |
| 200 km | 124.27 mi |
| 250 km | 155.34 mi |
| 300 km | 186.41 mi |
| 400 km | 248.55 mi |
| 500 km | 310.69 mi |
| 600 km | 372.82 mi |
| 750 km | 466.03 mi |
| 800 km | 497.1 mi |
| 900 km | 559.23 mi |
| 1000 km | 621.37 mi |
Real-world reference
A 5K run is 5 km. A full marathon is 42.195 km. The diameter of central London (Zone 1) is about 9 km. In miles, that gives you: 1 km = 0.621371 mi, 10 km = 6.21371 mi, 100 km = 62.1371 mi.
Frequently asked questions
- How many miles are in 1 kilometer?
- 1 kilometer equals 0.621371 miles.
- How do I convert kilometers to miles?
- Multiply the kilometer value by 0.621371. So x km × 0.621371 = the equivalent in mi.
- What is 5 kilometers in miles?
- 5 kilometers equals 3.10686 miles.
- What is 10 kilometers in miles?
- 10 kilometers equals 6.21371 miles.
- What is 100 kilometers in miles?
- 100 kilometers equals 62.1371 miles.
- How do I convert back from miles to kilometers?
- Multiply the mile value by 1.60934. For example, 1 mi = 1.60934 km.
- Is the kilometer bigger than the mile?
- No. 1 kilometer is smaller than 1 mile. It takes 1.60934 kilometers to equal 1 mile.
- Are these conversion factors exact?
- Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (0.621371) is exact within IEEE 754 double precision.
About the kilometer and the mile
The mile
The international (statute) mile (mi) is a unit of length in the imperial and US customary systems, defined as exactly 1609.344 meters (5,280 feet). It is the standard unit for road distances in the United States, the United Kingdom, and Liberia. Do not confuse it with the nautical mile, which is 1852 m.