Miles to Kilometers converter (mi → km)
342,400 mi = 551,039.39 km. 1 mi = 1.6093 km. Type any value below for an instant answer, or find your number in the conversion chart.
mi to km formula
Worked example: 80 mi = 128.7475 km. The defining value behind this factor is documented on our length & distance standards page.
Miles to Kilometers chart
Includes standard reference values plus the specific numbers people search for most.
| Miles (mi) | Kilometers (km) |
|---|---|
| 1 mi | 1.6093 km |
| 2 mi | 3.2187 km |
| 3 mi | 4.828 km |
| 4 mi | 6.4374 km |
| 5 mi | 8.0467 km |
| 6 mi | 9.6561 km |
| 7 mi | 11.2654 km |
| 8 mi | 12.8748 km |
| 9 mi | 14.4841 km |
| 10 mi | 16.0934 km |
| 12 mi | 19.3121 km |
| 15 mi | 24.1402 km |
| 18 mi | 28.9682 km |
| 20 mi | 32.1869 km |
| 25 mi | 40.2336 km |
| 26 mi | 41.8429 km |
| 30 mi | 48.2803 km |
| 40 mi | 64.3738 km |
| 50 mi | 80.4672 km |
| 75 mi | 120.7008 km |
| 80 mi | 128.7475 km |
| 90 mi | 144.841 km |
| 100 mi | 160.9344 km |
| 110 mi | 177.0278 km |
| 150 mi | 241.4016 km |
| 200 mi | 321.8688 km |
| 240 mi | 386.2426 km |
| 250 mi | 402.336 km |
| 300 mi | 482.8032 km |
| 500 mi | 804.672 km |
| 600 mi | 965.6064 km |
| 1000 mi | 1,609.34 km |
| 1500 mi | 2,414.02 km |
| 10000 mi | 16,093.44 km |
Most-searched mi to km answers
80 mi to km
128.7475 km18 mi to km
28.9682 km1500 mi to km
2,414.02 km4 mi to km
6.4374 km10 mi to km
16.0934 km50 mi to km
80.4672 km1 mi to km
1.6093 km5 mi to km
8.0467 km9 mi to km
14.4841 km10000 mi to km
16,093.44 km3 mi to km
4.828 km75 mi to km
120.7008 kmWhen to convert mi to km
Use miles to kilometers for road trips, races, maps and travel distances.
- ▸Translate a mile-based route into kilometers.
- ▸Compare race, walking or cycling distances across regions.
Common mistakes
- ✕This uses the statute mile of exactly 1.609344 km, not the 1.852 km nautical mile.
- ✕Mixing US and international inches — since 1959 all inches are 25.4 mm exactly; older US "survey foot" values are slightly different.
- ✕Off-by-decimal errors: 1 cm = 10 mm, 1 m = 100 cm — a misplaced decimal turns a mi into a wildly wrong km.
- ✕Confusing feet with yards (1 yd = 3 ft) in DIY calculations.
- ✕The US survey foot is not the international foot. The US survey foot was 1200/3937 m (about 0.30480061 m) — roughly 2 parts per million longer than the international foot of 0.3048 m. NIST retired it for new work at the end of 2022, but old survey and land records still use it. Over a mile the difference is about 3 mm; over 100 km it is about 200 mm, which matters in surveying and geodesy and nowhere else.
Regional usage & source
Metric units (mm, cm, m, km) are used in most of the world. Imperial units (in, ft, yd, mi) are standard in the US and still common in the UK for road distances and human height.
Reference: Conversion factors are defined by the International System of Units (SI) as maintained by the BIPM (bipm.org) and NIST (nist.gov). 1 inch = exactly 0.0254 meters (international yard and pound agreement, 1959).
How these numbers are produced and rounded: methodology.