Km to miles
One kilometer is 0.621371 miles. Type a length in kilometers to see it in miles.
How to convert kilometers to miles
miles = kilometers ÷ 1.609344
For example, 10 km is 6.21 mi. The mile is defined as exactly 1.609344 kilometers, so one kilometer is 0.621371 miles to six figures.
A quick way to do it in your head
Multiply by 5 and divide by 8. Or, more roughly, take six tenths.
- 80 km: 80 × 5 = 400, ÷ 8 = 50 miles. The true answer is 49.71 miles.
- 40 km: 200 ÷ 8 = 25 miles. The true answer is 24.85 miles.
- 120 km: 600 ÷ 8 = 75 miles. The true answer is 74.56 miles.
There is also a neat trick with the Fibonacci numbers 3, 5, 8, 13, 21, 34. Each one in kilometers is close to the one before it in miles: 8 km is about 5 miles, 13 km is about 8 miles, and 21 km is about 13 miles.
Kilometers to miles table
| Kilometers | Miles |
|---|---|
| 1 km | 0.62 mi |
| 2 km | 1.24 mi |
| 3 km | 1.86 mi |
| 5 km | 3.11 mi |
| 8 km | 4.97 mi |
| 10 km | 6.21 mi |
| 15 km | 9.32 mi |
| 20 km | 12.43 mi |
| 25 km | 15.53 mi |
| 30 km | 18.64 mi |
| 40 km | 24.85 mi |
| 50 km | 31.07 mi |
| 60 km | 37.28 mi |
| 80 km | 49.71 mi |
| 100 km | 62.14 mi |
| 150 km | 93.21 mi |
| 200 km | 124.27 mi |
| 300 km | 186.41 mi |
| 500 km | 310.69 mi |
| 1,000 km | 621.37 mi |
Race distances
| Race | Kilometers | Miles |
|---|---|---|
| 5K | 5 km | 3.11 mi |
| 10K | 10 km | 6.21 mi |
| Half marathon | 21.0975 km | 13.11 mi |
| Marathon | 42.195 km | 26.22 mi |
| 50K ultra | 50 km | 31.07 mi |
Km/h to mph
Speeds convert with the same factor as distances, because the hour is the same in both. A speed limit in kilometers per hour becomes miles per hour when you divide by 1.609344.
| Km/h | Mph |
|---|---|
| 30 km/h | 18.6 mph |
| 40 km/h | 24.9 mph |
| 50 km/h | 31.1 mph |
| 60 km/h | 37.3 mph |
| 70 km/h | 43.5 mph |
| 80 km/h | 49.7 mph |
| 90 km/h | 55.9 mph |
| 100 km/h | 62.1 mph |
| 110 km/h | 68.4 mph |
| 120 km/h | 74.6 mph |
| 130 km/h | 80.8 mph |
If you drive a car from the United States or the United Kingdom in a country that uses kilometers, the inner ring of numbers on the speedometer is usually km/h. A 50 km/h town limit is 31 mph, and a 130 km/h motorway limit is 81 mph.
To go the other way, use miles to km. For other units, see the unit converter.
Questions
How many miles is 1 kilometer?
0.621371 mi.
How many miles is 5 km?
3.11 mi.
How many miles is 10 km?
6.21 mi.
How many miles is 100 km?
62.14 mi.
How long does it take to walk a kilometer?
About 10 to 12 minutes at an ordinary walking pace, compared with 16 to 20 minutes for a mile.
Which countries use miles?
Road distances are signed in miles in the United States and the United Kingdom, and in a few smaller countries and territories. Almost everywhere else uses kilometers.