Miles to Kilometers
Convert miles (mi) to kilometers (km) instantly.
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| Miles (mi) | Kilometers (km) |
|---|---|
| 1 mi | 1.609344 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 26.2 mi | 42.164813 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
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Miles and kilometers: a brief history
The mile traces back to the Roman "mille passuum" (a thousand paces), which was approximately 1,480 meters. Over centuries it evolved, and the modern international mile was standardized at exactly 1,609.344 meters in 1959.
The kilometer is part of the metric system introduced in France in the 1790s. It equals exactly 1,000 meters. Most of the world uses kilometers for road distances, while the United States, United Kingdom, and a few others still use miles.
For runners: a 5K race is 3.1 miles, a 10K is 6.2 miles, and a marathon (42.195 km) is 26.2 miles. For travelers: highway speed limits in Europe are typically 120–130 km/h, which equals roughly 75–80 mph.
Frequently asked questions
How many kilometers in a mile?
There are 1.60934 kilometers in one mile.
What is a marathon in kilometers?
A marathon is 26.2 miles, which equals approximately 42.195 kilometers.