Miles to Kilometers Converter
Convert miles to kilometers instantly. Type any mile value and get the exact km result. Includes a distance table, formula, and running and driving examples.
Built and maintained by Will Henschell, Data Scientist. Editorial policy.
Kilometers (km)
Need the reverse? Convert kilometers to miles →
Common Miles to Kilometers Conversions
| miles (mi) | kilometers (km) | Note |
|---|---|---|
| 0.5 mi | 0.805 km | ½ mile |
| 1 mi | 1.609 km | 1 mile |
| 3.107 mi | 5 km | 5K race |
| 6.214 mi | 10 km | 10K race |
| 13.109 mi | 21.097 km | Half marathon |
| 26.219 mi | 42.195 km | Marathon |
| 50 mi | 80.467 km | 50 miles |
| 100 mi | 160.934 km | 100 miles |
The Miles-to-Kilometers Formula
1 international mile = 1,760 yards. Since 1 yard is defined as exactly 0.9144 meters, 1 mile = 1,760 × 0.9144 = 1,609.344 meters = 1.609344 kilometers exactly. To convert miles to kilometers, multiply by 1.60934. A useful shortcut: multiply by 1.6 — accurate within 0.2%. Example: 10 miles × 1.60934 = 16.09 km; 26.2 miles (marathon) × 1.60934 = 42.16 km.
Miles to Kilometers for Running and Fitness
Running distances are marked in kilometers in most countries and in miles in the US and UK. Standard race distances: 5 km = 3.107 miles, 10 km = 6.214 miles, half marathon = 21.097 km = 13.109 miles, marathon = 42.195 km = 26.219 miles. Treadmill speeds often show both units: an easy run at 10 km/h = 6.21 mph; a 9-minute mile pace = 6.67 mph = 10.73 km/h; a 7-minute mile = 8.57 mph = 13.79 km/h. GPS watches let you switch between miles and kilometers, but knowing the conversion helps when racing internationally.
Driving and Speed: Miles vs. Kilometers
The US and UK use miles per hour (mph) for road speed limits and odometers; most other countries use kilometers per hour (km/h). Common comparisons: 60 mph = 96.6 km/h; 65 mph = 104.6 km/h; 70 mph = 112.7 km/h; 100 km/h = 62.1 mph; 130 km/h = 80.8 mph. City driving: 30 mph = 48.3 km/h; 50 mph = 80.5 km/h. Rental car speedometers in Europe show km/h; US rentals in Europe require adjustment to avoid speed limit violations.
Frequently Asked Questions
How many kilometers is 1 mile?
1 mile equals exactly 1.609344 kilometers (rounded to 1.609 km). This is an exact conversion defined by international agreement.
How do I convert miles to km?
Multiply miles by 1.609 (or 1.6 for a quick estimate). Example: 10 miles × 1.609 = 16.09 km.
How far is a 5K in miles?
5 km ÷ 1.60934 = 3.107 miles. A 5K race is approximately 3.1 miles.
How far is a marathon in kilometers?
A marathon is exactly 26.219 miles = 42.195 km. The official marathon distance of 42.195 km was standardized at the 1908 London Olympics.