Miles to Kilometers
Convert Miles to Kilometers instantly.
How to Convert Miles to Kilometers
To convert miles to kilometers, multiply the number of miles by 1.60934. One mile equals exactly 1.60934 kilometers — a relationship established by international agreement in 1959. The mile is the standard unit of road distance in the United States, United Kingdom, and a handful of other countries, while the kilometer is used throughout most of the world. This conversion comes up constantly in travel, running, cycling, and comparing vehicle fuel efficiency across countries.
Miles to Kilometers Reference Chart
Common conversions: 1 mile = 1.609 km · 5 miles = 8.047 km · 10 miles = 16.093 km · 13.1 miles (half marathon) = 21.082 km · 26.2 miles (marathon) = 42.165 km · 100 miles = 160.934 km. A quick mental approximation: multiply miles by 1.6 to get a close estimate in kilometers.
Frequently Asked Questions
How many kilometers are in a mile?
One mile equals exactly 1.60934 kilometers. This is based on the international definition of the mile as exactly 1,609.344 meters, established in 1959 by the International Yard and Pound Agreement.
What is the formula for miles to km?
Kilometers = Miles × 1.60934. For a quick mental estimate, multiply by 1.6 — this gives you a result within 0.6% of the exact value. For example, 10 miles × 1.60934 = 16.09 km.
Why does the US use miles instead of kilometers?
The United States retained the mile from the British imperial system when it gained independence in 1776. While most countries converted to the metric system during the 20th century, the US, United Kingdom, Myanmar, and Liberia still use miles for road distances. The US officially adopted the metric system for scientific and commercial use in 1975, but everyday road measurement never transitioned.
How fast is 60 mph in km/h?
60 miles per hour equals 60 × 1.60934 = 96.56 km/h. A useful approximation: highway speed limits of 55, 60, 65, and 70 mph correspond to roughly 88, 97, 105, and 113 km/h respectively. Many speed cameras and GPS devices display both units simultaneously.