Kilometer Conversion Calculator
Enter a value in kilometers below to convert to another unit of length.
Do you want to convert kilometers to miles?
What Is a Kilometer?
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A kilometer is a unit used to measure length.
The kilometer, or kilometre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "kilo" is the prefix for thousands, or 103. Kilometers can be abbreviated as km; for example, 1 kilometer can be written as 1 km.
Uses
The kilometer is officially used for expressing distance between geographical places around the world, with the exception of the United States, which uses the mile. In the US, it is actually prohibited to use federal highway funding to purchase road signs using kilometers or other metric units.
How Long Is a Kilometer?
One kilometer is equal to 1,000 meters, which are defined as the distance light travels in a vacuum in 1/299,792,458 of a second.[1] One kilometer is equal to 0.621371 miles.
How to Convert Kilometers
To convert kilometers to another unit of length, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[2]
You can find the conversion factors for kilometers in the conversion table below.
Then, multiply the length measurement by the conversion factor to find the equivalent value in the desired unit of measurement.
kilometers × conversion factor = result
You can also use a calculator, such as one of the converters below, for the conversion.
Kilometer Conversion Table
| kilometers | miles | yards | feet | inches | meters | centimeters | millimeters | micrometers | nanometers |
|---|---|---|---|---|---|---|---|---|---|
| 1 km | 0.621371 mi | 1,094 yd | 3,281' | 39,370" | 1,000 m | 100,000 cm | 1,000,000 mm | 1,000,000,000 µm | 1,000,000,000,000 nm |
| 2 km | 1.242742 mi | 2,187 yd | 6,562' | 78,740" | 2,000 m | 200,000 cm | 2,000,000 mm | 2,000,000,000 µm | 2,000,000,000,000 nm |
| 3 km | 1.864114 mi | 3,281 yd | 9,843' | 118,110" | 3,000 m | 300,000 cm | 3,000,000 mm | 3,000,000,000 µm | 3,000,000,000,000 nm |
| 4 km | 2.485485 mi | 4,374 yd | 13,123' | 157,480" | 4,000 m | 400,000 cm | 4,000,000 mm | 4,000,000,000 µm | 4,000,000,000,000 nm |
| 5 km | 3.106856 mi | 5,468 yd | 16,404' | 196,850" | 5,000 m | 500,000 cm | 5,000,000 mm | 5,000,000,000 µm | 5,000,000,000,000 nm |
| 6 km | 3.728227 mi | 6,562 yd | 19,685' | 236,220" | 6,000 m | 600,000 cm | 6,000,000 mm | 6,000,000,000 µm | 6,000,000,000,000 nm |
| 7 km | 4.349598 mi | 7,655 yd | 22,966' | 275,591" | 7,000 m | 700,000 cm | 7,000,000 mm | 7,000,000,000 µm | 7,000,000,000,000 nm |
| 8 km | 4.97097 mi | 8,749 yd | 26,247' | 314,961" | 8,000 m | 800,000 cm | 8,000,000 mm | 8,000,000,000 µm | 8,000,000,000,000 nm |
| 9 km | 5.592341 mi | 9,843 yd | 29,528' | 354,331" | 9,000 m | 900,000 cm | 9,000,000 mm | 9,000,000,000 µm | 9,000,000,000,000 nm |
| 10 km | 6.213712 mi | 10,936 yd | 32,808' | 393,701" | 10,000 m | 1,000,000 cm | 10,000,000 mm | 10,000,000,000 µm | 10,000,000,000,000 nm |
| 11 km | 6.835083 mi | 12,030 yd | 36,089' | 433,071" | 11,000 m | 1,100,000 cm | 11,000,000 mm | 11,000,000,000 µm | 11,000,000,000,000 nm |
| 12 km | 7.456454 mi | 13,123 yd | 39,370' | 472,441" | 12,000 m | 1,200,000 cm | 12,000,000 mm | 12,000,000,000 µm | 12,000,000,000,000 nm |
| 13 km | 8.077825 mi | 14,217 yd | 42,651' | 511,811" | 13,000 m | 1,300,000 cm | 13,000,000 mm | 13,000,000,000 µm | 13,000,000,000,000 nm |
| 14 km | 8.699197 mi | 15,311 yd | 45,932' | 551,181" | 14,000 m | 1,400,000 cm | 14,000,000 mm | 14,000,000,000 µm | 14,000,000,000,000 nm |
| 15 km | 9.320568 mi | 16,404 yd | 49,213' | 590,551" | 15,000 m | 1,500,000 cm | 15,000,000 mm | 15,000,000,000 µm | 15,000,000,000,000 nm |
| 16 km | 9.941939 mi | 17,498 yd | 52,493' | 629,921" | 16,000 m | 1,600,000 cm | 16,000,000 mm | 16,000,000,000 µm | 16,000,000,000,000 nm |
| 17 km | 10.56331 mi | 18,591 yd | 55,774' | 669,291" | 17,000 m | 1,700,000 cm | 17,000,000 mm | 17,000,000,000 µm | 17,000,000,000,000 nm |
| 18 km | 11.184681 mi | 19,685 yd | 59,055' | 708,661" | 18,000 m | 1,800,000 cm | 18,000,000 mm | 18,000,000,000 µm | 18,000,000,000,000 nm |
| 19 km | 11.806053 mi | 20,779 yd | 62,336' | 748,031" | 19,000 m | 1,900,000 cm | 19,000,000 mm | 19,000,000,000 µm | 19,000,000,000,000 nm |
| 20 km | 12.427424 mi | 21,872 yd | 65,617' | 787,402" | 20,000 m | 2,000,000 cm | 20,000,000 mm | 20,000,000,000 µm | 20,000,000,000,000 nm |
Kilometer Conversion Calculators
You can also convert length using one of our kilometer converters below.
Try our other measurement calculators.
References
- Ambler Thompson and Barry N. Taylor, Guide for the Use of the International System of Units (SI), National Institute of Standards and Technology, https://physics.nist.gov/cuu/pdf/sp811.pdf
- National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion