ConvertOnlineKilometers to Miles calculator
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Kilometers to Miles formula
Use this formula to convert kilometers to miles:
Calculation
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Kilometers to Miles Conversion Table
Reference values for converting Kilometers to Miles.
| Kilometers (km) | Miles (mi) |
|---|---|
| 0 km | 0 mi |
| 1 km | 0.6214 mi |
| 2 km | 1.2427 mi |
| 5 km | 3.1069 mi |
| 10 km | 6.2137 mi |
| 20 km | 12.4274 mi |
| 50 km | 31.0686 mi |
| 100 km | 62.1371 mi |
Worked example
Convert 400 Kilometers to Miles
Miles = 400 / 1.609344 = 248.5485 Miles
About these units
Kilometers
A kilometer (km) is a unit of length in the International System of Units (SI), equal to 0.6214 miles. One kilometer is one thousand meters.
The prefix "kilo-" means one thousand. A kilometer is defined by 1000 times the distance light travels in 1/299,792,458 seconds. This definition may change, but a kilometer will always be one thousand meters.
Kilometers are used to measure distances on land in most countries. However, the United States and the United Kingdom still often use miles. The UK has adopted the metric system, but miles are still used on road signs.
Miles
A mile (symbol: mi or m) is a unit of length commonly used in the United States and the United Kingdom. One mile is equal to 1.60934 kilometers.
The mile originated from the Roman mile, which was 1,000 paces. The current definition of a mile is based on the international agreement and equals exactly 1,609.344 meters.
Miles are mainly used to measure distances in the United States and the United Kingdom, especially for road systems. While most of the world uses kilometers, the mile remains prevalent in these countries.
Frequently asked questions
What is the difference between kilometers and miles?
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