How to convert miles to kilometers
To convert a measurement in miles to kilometers, multiply the value by 1.609344. The conversion factor comes from the relationship between both units and the meter (the SI base unit of length).
For example, to convert 5 mi to kilometers: 5 × 1.609344 = 8.04672 km.
What is a mile?
A mile is an imperial unit of length equal to 5,280 feet, 1,760 yards, or exactly 1,609.344 meters. Derived from the Roman 'mille passus' (a thousand paces), originally 5,000 Roman feet. The statute mile of 5,280 feet was established by English Parliament in 1593 and standardized internationally in 1959.
Common uses of miles include: Road distances and speed limits in the US, UK, and Myanmar; Vehicle odometer readings in imperial countries; Running and fitness tracking (mile splits); Property and real estate distance descriptions.
What is a kilometer?
A kilometer is a metric unit of length equal to 1,000 meters or approximately 0.621 miles. The kilometer was introduced with the metric system in France in 1795, derived from the Greek 'khilioi' (thousand) and 'metron' (measure). It became the standard unit for measuring road distances in most countries.
Common uses of kilometers include: Road distances and speed limits in most countries; Running events (5K, 10K, marathon distances); Geographic distances between cities; Aviation altitude reporting in some regions.
When you need to convert miles to kilometers
Planning a road trip abroad? Most countries display distances in kilometers. Converting your familiar miles to kilometers helps estimate travel time and fuel requirements.
Miles to kilometers worked examples
Here are some common values converted:
1 mi = 1.609344 km 5 mi = 8.04672 km 10 mi = 16.09344 km 50 mi = 80.4672 km 100 mi = 160.9344 km
Frequently asked questions
How many kilometers are in one mile?
One mile (mi) equals 1.609344 kilometers (km). Multiply any value in miles by 1.609344 to convert to kilometers.
How do I convert miles to kilometers?
Multiply the value in miles by 1.609344. For example, 5 mi × 1.609344 = 8.04672 km.
How do I convert kilometers to miles?
Multiply the value in kilometers by 0.6213711922, or divide by 1.609344. Use the swap button on the converter above to reverse the direction.
Is the mile to kilometer conversion exact?
Yes, the conversion is exact. Since 1959, one inch is defined as exactly 25.4 mm (the international yard and pound agreement), so all metric-imperial length conversions use exact factors.
What is the formula for miles to kilometers?
The formula is: km = mi × 1.609344. This is derived from the definition of both units relative to the meter (the SI base unit of length).