Last updated: July 2026
Convert Miles to Kilometers (mi to km)
Converting between US imperial miles and metric kilometers is essential for everything from planning a road trip abroad to tracking your running distance. Use our free calculator to get instant, accurate results.
The Conversion Formula
The math is simple: Kilometers = Miles × 1.60934. The United States and the United Kingdom primarily use miles for distance, while almost the entire rest of the world uses kilometers.
Worked Examples
- 1 mile = 1.60934 km
- 5 miles = 8.05 km
- 10 miles = 16.09 km
- 26.2 miles (marathon) ≈ 42.16 km
Frequently Asked Questions
There are approximately 1.60934 kilometers in one mile.
To convert miles to kilometers, multiply the distance in miles by 1.60934. For example, 5 miles equals about 8.05 km.
Divide the distance in kilometers by 1.60934, or multiply by approximately 0.62137. For example, 10 km ≈ 6.21 miles.
A 5k (5 kilometers) run is approximately 3.1 miles.
A 10k (10 kilometers) run is approximately 6.21 miles.
The mile is officially defined as exactly 1.609344 kilometers, so 1.60934 is a rounded but highly precise figure for everyday use.
For a rough estimate, multiply miles by 1.6. It's slightly less precise than 1.60934 but close enough for everyday distances, road signs, or quick trip planning.
The US never fully converted to the metric system for everyday use. Miles remain standard for road signs, speed limits, and race distances, while the UK uses a mix of both miles and kilometers.