1 kilometer = 0.62137119 mi
1 km = 0.621371 mi · type math like (12*4)+6.5
Kilometers to miles is the conversion runners, drivers and travellers use most. Race distances like the 5K and marathon are set in kilometers, while American and British road signs, car odometers and many fitness apps still talk in miles.
Cycling and triathlon also live on this conversion. A 40 km Olympic triathlon bike leg is 24.85 miles, and the 180 km Ironman bike course is 111.85 miles. Strava and Garmin let you switch units, but group rides announced in one system and tracked in another regularly cause confusion over who actually rode the farthest.
Signs abroad catch drivers out, too. A sign reading 'Exit 2 km' is 1.24 miles away, which at 100 km/h arrives in just over a minute. Speedometers in most rental cars outside the US and UK show km/h as the main scale, so the same habit of multiplying by about 0.62 helps with both distance and speed.
Ultramarathons like the 100 km race are 62.14 miles.
Cycling's Tour de France covers about 3,400 km, which is roughly 2,113 miles.
A good sanity check is that the mile figure should always be a little over 60% of the kilometer figure. If you convert 250 km and get something near 155 miles, you are right; if you get 400, you multiplied by 1.609 instead of dividing. Car navigation systems in Europe can usually be switched to miles in the settings menu, which saves converting each road sign as you drive through countries that use kilometers.
mi = km × 0.6213711922
Reverse: 1 mi = 1.609344 km.
How many miles is a 10K race?
Answer: 10 km = 6.21 miles.
| km | mi |
|---|---|
| ¼ km | 0.1553428 mi |
| ½ km | 0.3106856 mi |
| ¾ km | 0.46602839 mi |
| 1 km | 0.62137119 mi |
| 2 km | 1.2427424 mi |
| 3 km | 1.8641136 mi |
| 4 km | 2.4854848 mi |
| 5 km | 3.106856 mi |
| 6 km | 3.7282272 mi |
| 7 km | 4.3495983 mi |
| 8 km | 4.9709695 mi |
| 9 km | 5.5923407 mi |
| 10 km | 6.2137119 mi |
| 11 km | 6.8350831 mi |
| 12 km | 7.4564543 mi |
| 13 km | 8.0778255 mi |
| km | mi |
|---|---|
| 14 km | 8.6991967 mi |
| 15 km | 9.3205679 mi |
| 16 km | 9.9419391 mi |
| 17 km | 10.56331 mi |
| 18 km | 11.184681 mi |
| 19 km | 11.806053 mi |
| 20 km | 12.427424 mi |
| 25 km | 15.53428 mi |
| 30 km | 18.641136 mi |
| 40 km | 24.854848 mi |
| 50 km | 31.06856 mi |
| 75 km | 46.602839 mi |
| 100 km | 62.137119 mi |
| 250 km | 155.3428 mi |
| 500 km | 310.6856 mi |
| 1 000 km | 621.37119 mi |
42.195 km × 0.6213712 = 26.219 miles, the famous 26.2.
A 5 km run is 3.107 miles; a 10 km race is 6.214 miles.
Paris to Lyon by motorway is about 465 km, or 289 miles.
A nautical mile is 1.852 km, not 1.609 km. Kilometers to nautical miles is a separate conversion used at sea and in the air.
0.6 works for estimates, but over 500 km it gives 300 miles instead of 310.7, an error of more than 10 miles.
Miles are longer than kilometers, so the mile number should always be smaller. 100 km is 62 miles, not 161.
A kilometer is 1,000 meters. One kilometer equals about 0.6214 miles.
Origin. The kilometer was part of the original 1795 French metric system; kilo- comes from the Greek chilioi, a thousand.
Used today. Kilometers are used for road distances and speed limits in almost every country, for running and cycling races, and for map scales.
The international statute mile is exactly 1,609.344 m, which is 5,280 feet or 1,760 yards.
Origin. The Roman mille passus was a thousand double paces, about 1,480 m. England set the statute mile at 8 furlongs, 5,280 feet, in 1593 under Elizabeth I.
Used today. Miles remain the official road distance unit in the United States, United Kingdom and a few other places such as Liberia, and they are used for track records like the four-minute mile.
Consecutive Fibonacci numbers have a ratio near 1.618, close to 1.609. So 8 km is about 5 miles, 13 km about 8 miles, and 21 km about 13 miles.
21.0975 km is 13.109 miles.
Yes, 100 km/h is 62.14 mph, because speed converts with the same factor as distance.
Road signs use miles, but the Ordnance Survey grid and many running events use kilometers.