Convert miles to kilometers instantly. Enter any mile value and get the exact kilometer equivalent, plus the formula and a full reference table.
The conversion factor is derived from SI base values:
The international mile (statute mile) is defined as exactly 1609.344 meters.
| Miles (mi) | Kilometers (km) |
|---|---|
| 0.25 mi | 0.4023 km |
| 0.5 mi | 0.8047 km |
| 1 mi | 1.6093 km |
| 3 mi | 4.828 km |
| 5 mi | 8.0467 km |
| 10 mi | 16.093 km |
| 26.2 mi | 42.165 km |
| 50 mi | 80.467 km |
| 100 mi | 160.93 km |
| 500 mi | 804.67 km |
1 mile equals 1.60934 km. The US uses miles for road distances; most other countries use kilometers.
5 km ÷ 1.60934 = 3.107 miles.
A marathon is 26.2 miles, which equals 42.195 km (the official marathon distance is 42.195 km).
Multiply by 1.6 for a rough estimate. For precision, use the exact factor of 1.60934.
The word "mile" comes from the Latin mille passuum (a thousand paces). The Roman mile was about 1480 m; the modern statute mile is 1609.344 m, established by international agreement in 1959.