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Italiano1 mile = 1.609344 km
To convert miles to km, multiply by 1.609344: km = miles × 1.609344. A 26.2-mile marathon is 26.2 × 1.609344 = 42.16 km.
Enter your distance in the converter. It answers as you type (26.2 mi = 42.1648 km), shows the factor on the "Formula:" line and lists the same distance in meters, yards and nautical miles in the "In every unit" table.
Miles to km conversion chart
| Miles | Kilometers | What it is |
|---|---|---|
| 1 | 1.61 | The mile on the track |
| 3 | 4.83 | Just short of a 5K |
| 5 | 8.05 | 5-mile race |
| 10 | 16.09 | 10-mile race |
| 13.1 | 21.08 | Half marathon |
| 26.2 | 42.16 | Marathon |
| 50 | 80.47 | 50-mile ultra |
| 100 | 160.93 | 100-mile ultra |
| 300 | 482.80 | Half a day on the road |
| 500 | 804.67 | A long day on the road |
| 874 | 1,406.57 | Land's End to John o' Groats |
| 2,448 | 3,939.67 | Route 66, Chicago to Santa Monica |
When you need kilometers
Race distances
A mile is 1,609.344 m: four laps of a 400 m track plus 9.34 m. Your usual 5-mile loop is 8.05 km, so a bit more than three extra kilometers separate it from a 5K. The 13.1 and 26.2 on finisher shirts are rounded: the official half marathon is 21.0975 km (13.1094 miles) and the marathon is 42.195 km (26.2188 miles).
Speed limits abroad
The same factor turns mph into km/h. The speeds you know become 30 mph = 48.28 km/h, 50 mph = 80.47 km/h, 60 mph = 96.56 km/h and 70 mph = 112.65 km/h. So a 50 km/h town limit in Europe is close to 30 mph, and a 110 km/h highway limit is a little under 70 mph.
Road trips
Planning a drive in Canada, Ireland or mainland Europe with a car that counts miles? A 300-mile range is 482.8 km on the signs. In the US and the UK the signs stay in miles, so you only need this for maps, rental paperwork and navigation apps set to metric.
Statute mile and nautical mile
The nautical mile used at sea and in aviation is 1.852 km, about 15% longer than the statute mile (1 nautical mile = 1.1508 miles). The tool lists both units, so check which one your source means.
Doing it in your head
Add half, then add a tenth: that is multiplying by 1.6. For 50 miles: 50 + 25 + 5 = 80 km, against an exact 80.47 km. The shortcut is 0.6% low, about 600 m missing for every 100 km.
Frequently asked questions
How many km are in a mile?
Exactly 1.609344 km. A mile is 1,760 yards of 0.9144 m each, which makes 1,609.344 m.
What is 60 mph in km/h?
60 × 1.609344 = 96.56 km/h. At that speed you cover a mile a minute.
How many miles is a 10K?
6.21 miles. Going the other way, 6.2 miles comes to 9.98 km, just short of the full distance.